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  <div class="headertitle"><div class="title">native_socket_stream_impl_snd.cpp</div></div>
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<a href="native__socket__stream__impl__snd_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/* Flow-IPC: Core</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment"> * Copyright 2023 Akamai Technologies, Inc.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> *</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> * Licensed under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * &quot;License&quot;); you may not use this file except in</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * compliance with the License.  You may obtain a copy</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> * of the License at</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> *</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> *   https://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> *</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> * Unless required by applicable law or agreed to in</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> * writing, software distributed under the License is</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * See the License for the specific language governing</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * permissions and limitations under the License. */</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"></span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">/// @file</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"></span><span class="preprocessor">#include &quot;<a class="code" href="sync__io_2detail_2native__socket__stream__impl_8hpp.html">ipc/transport/sync_io/detail/native_socket_stream_impl.hpp</a>&quot;</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="preprocessor">#include &quot;<a class="code" href="ipc__core_2src_2ipc_2transport_2error_8hpp.html">ipc/transport/error.hpp</a>&quot;</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="preprocessor">#include &lt;boost/move/make_unique.hpp&gt;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span> </div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceipc_1_1transport_1_1sync__io.html">ipc::transport::sync_io</a></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span>{</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span><span class="comment">// Native_socket_stream::Impl implementations (::snd_*() and send-API methods only).</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span> </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a65eea0cec146df598fce1d9ab5ce7e15">   28</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a65eea0cec146df598fce1d9ab5ce7e15">Native_socket_stream::Impl::start_send_native_handle_ops</a>(<a class="code hl_typedef" href="namespaceipc_1_1util_1_1sync__io.html#aa0b9a3cc6bdc7dedbef4f9e06851aa24">util::sync_io::Event_wait_func</a>&amp;&amp; ev_wait_func)</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span>{</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">util::Blob_const</a>;</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span> </div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>  <span class="keywordflow">if</span> (!start_ops&lt;Op::S_SND&gt;(std::move(ev_wait_func)))</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>  {</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span>  }</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>  <span class="keyword">const</span> <span class="keyword">auto</span> protocol_ver_to_send_if_needed = <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a393316703a666a9b022f2b879337b920">m_protocol_negotiator</a>.<a class="code hl_function" href="classipc_1_1transport_1_1Protocol__negotiator.html#a54480f0849ddb5635302b42ed87c43af">local_max_proto_ver_for_sending</a>();</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>  <span class="keywordflow">if</span> (protocol_ver_to_send_if_needed != <a class="code hl_variable" href="classipc_1_1transport_1_1Protocol__negotiator.html#aa7e47f4f6a700aeaa9600a5426a17292">Protocol_negotiator::S_VER_UNKNOWN</a>)</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>  {</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span>    assert((<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a393316703a666a9b022f2b879337b920">m_protocol_negotiator</a>.<a class="code hl_function" href="classipc_1_1transport_1_1Protocol__negotiator.html#a54480f0849ddb5635302b42ed87c43af">local_max_proto_ver_for_sending</a>() == <a class="code hl_variable" href="classipc_1_1transport_1_1Protocol__negotiator.html#aa7e47f4f6a700aeaa9600a5426a17292">Protocol_negotiator::S_VER_UNKNOWN</a>)</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span>           &amp;&amp; <span class="stringliteral">&quot;Protocol_negotiator not properly marking the once-only sending-out of protocol version?&quot;</span>);</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span> </div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span>    assert((!<a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a0257a7903bff120aa1523f8de04bccf7">m_snd_pending_err_code</a>) &amp;&amp; <span class="stringliteral">&quot;We should be the first send-related transmission code possible.&quot;</span>);</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>    <span class="comment">/* As discussed in m_protocol_negotiator doc header and class doc header &quot;Protocol negotiation&quot; section:</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span><span class="comment">     * send a special as-if-send_blob()-user-message: no Native_handle; meta-blob = sized</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span><span class="comment">     * to sizeof(protocol_ver_to_send_if_needed), containing protocol_ver_to_send_if_needed.</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span><span class="comment">     * By the way m_protocol_negotiator logged about the fact we&#39;re about to send it, so we can be pretty quiet.</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span><span class="comment">     *</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span><span class="comment">     * The mechanics here are very similar to how send_native_handle() invokes snd_sync_write_or_q_payload().</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span><span class="comment">     * Keeping comments light, except where something different applies (as of this writing that&#39;s just: the</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span><span class="comment">     * meaning of snd_sync_write_or_q_payload() return value). */</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span> </div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>    <span class="keyword">const</span> <span class="keyword">auto</span> fake_meta_length_raw = <a class="code hl_typedef" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a881c376f1ee37f9b1a20f770824f55d9">low_lvl_payload_blob_length_t</a>(protocol_ver_to_send_if_needed);</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>    <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">Blob_const</a> payload_blob(&amp;fake_meta_length_raw, <span class="keyword">sizeof</span>(fake_meta_length_raw));</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span> </div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Want to send protocol-negotiation info.  &quot;</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>                   <span class="stringliteral">&quot;About to send payload 1 of 1; &quot;</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>                   <span class="stringliteral">&quot;contains low-level blob of size [&quot;</span> &lt;&lt; payload_blob.size() &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>                   <span class="stringliteral">&quot;located @ [&quot;</span> &lt;&lt; payload_blob.data() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span> </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>    <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a3c1c949f345f0ceef5eeca3c2edec291">snd_sync_write_or_q_payload</a>({}, payload_blob, <span class="keyword">false</span>);</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>    <span class="comment">/* m_send_pending_err_code may have become truthy; just means next send_*()/whatever will emit that error.</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span><span class="comment">     *</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span><span class="comment">     * Otherwise: Either it inline-sent it (very likely), or it got queued.</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span><span class="comment">     *            Either way: no error; let&#39;s get on with queuing-or-sending real stuff like send_*() payloads.</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span><span class="comment">     * P.S. There&#39;s only 1 protocol version as of this writing, so there&#39;s no ambiguity, and we can just get on with</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span><span class="comment">     * sending stuff right away.  This could change in the future.  See m_protocol_negotiator doc header for more. */</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>  }</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>  <span class="keywordflow">else</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>  {</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Wanted to send protocol-negotiation info; &quot;</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>                   <span class="stringliteral">&quot;but we&#39;ve marked it as already-sent, even though we are in start_*_ops() in PEER state.  &quot;</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>                   <span class="stringliteral">&quot;Probably we come from a .release()d Native_socket_stream which has already done it; cool.&quot;</span>);</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span> </div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>  }</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span>  <span class="comment">// else { Corner case... we come from a .release()d guy.  See Impl::reset_sync_io_setup().  Already sent it. }</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span> </div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>} <span class="comment">// Native_socket_stream::Impl::start_send_native_handle_ops()</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span> </div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a6a01d2df2772ee72e4386e84684394e3">   83</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a6a01d2df2772ee72e4386e84684394e3">Native_socket_stream::Impl::start_send_blob_ops</a>(<a class="code hl_typedef" href="namespaceipc_1_1util_1_1sync__io.html#aa0b9a3cc6bdc7dedbef4f9e06851aa24">util::sync_io::Event_wait_func</a>&amp;&amp; ev_wait_func)</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>{</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#a2bd0b6a8badd0b770917bb9df9ad6093">start_send_native_handle_ops</a>(std::move(ev_wait_func));</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>}</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span> </div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#aaef639c110a0e3d6804da84f9458ae78">   88</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#aaef639c110a0e3d6804da84f9458ae78">Native_socket_stream::Impl::send_blob</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">util::Blob_const</a>&amp; blob, <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* err_code)</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span>{</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>  <span class="comment">// Just use this in degraded fashion.</span></div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#a9805f7625a1272af64295555f9a1a61b">send_native_handle</a>(<a class="code hl_typedef" href="namespaceipc_1_1transport.html#a7ee4551983d9df16ec16a3139bac50e8">Native_handle</a>(), blob, err_code);</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>}</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span> </div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a59e9935bdd704c40173a40e87b5db131">   94</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a59e9935bdd704c40173a40e87b5db131">Native_socket_stream::Impl::send_native_handle</a>(<a class="code hl_struct" href="structipc_1_1util_1_1Native__handle.html">Native_handle</a> hndl_or_null, <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">util::Blob_const</a>&amp; meta_blob,</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>                                                    <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* err_code)</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>{</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">util::Fine_duration</a>;</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">util::Blob_const</a>;</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>  <span class="keyword">using </span>flow::util::buffers_dump_string;</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>  <span class="keyword">using </span>boost::chrono::round;</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>  <span class="keyword">using </span>boost::chrono::milliseconds;</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span> </div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>  FLOW_ERROR_EXEC_AND_THROW_ON_ERROR(<span class="keywordtype">bool</span>, <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a59e9935bdd704c40173a40e87b5db131">Native_socket_stream::Impl::send_native_handle</a>,</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>                                     hndl_or_null, flow::util::bind_ns::cref(meta_blob), _1);</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>  <span class="comment">// ^-- Call ourselves and return if err_code is null.  If got to present line, err_code is not null.</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span> </div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span>  <span class="comment">// We comment liberally, but tactically, inline; but please read the strategy in the class doc header&#39;s impl section.</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span> </div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>  <span class="keywordflow">if</span> ((!op_started&lt;Op::S_SND&gt;(<span class="stringliteral">&quot;send_native_handle()&quot;</span>)) || (!state_peer(<span class="stringliteral">&quot;send_native_handle()&quot;</span>)))</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>  {</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span>    err_code-&gt;clear();</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>  }</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span> </div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> meta_size = meta_blob.size();</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>  assert(((!hndl_or_null.<a class="code hl_function" href="structipc_1_1util_1_1Native__handle.html#a11bd62ce0a7bef4bdfe666201c26d4dc">null</a>()) || (meta_size != 0))</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>         &amp;&amp; <span class="stringliteral">&quot;Native_socket_stream::send_blob() blob must have length 1+; &quot;</span></div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>              <span class="stringliteral">&quot;Native_socket_stream::send_native_handle() must have same or non-null hndl_or_null or both.&quot;</span>);</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span> </div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>  FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Will send handle [&quot;</span> &lt;&lt; hndl_or_null &lt;&lt; <span class="stringliteral">&quot;] with &quot;</span></div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>                 <span class="stringliteral">&quot;meta-blob of size [&quot;</span> &lt;&lt; meta_blob.size() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>  <span class="keywordflow">if</span> (meta_size != 0)</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>  {</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>    <span class="comment">// Verbose and slow (100% skipped unless log filter passes).</span></div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span>    FLOW_LOG_DATA(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Meta-blob contents are &quot;</span></div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span>                  <span class="stringliteral">&quot;[\n&quot;</span> &lt;&lt; buffers_dump_string(meta_blob, <span class="stringliteral">&quot;  &quot;</span>) &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>  }</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span> </div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>  <span class="keywordflow">if</span> (m_snd_finished)</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>  {</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>    <span class="comment">/* If they called *end_sending() before, then by definition (see doc header impl discussion)</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span><span class="comment">     * any future send attempt is to be ignored with this error.  Even though previously queued stuff can and should</span></div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span><span class="comment">     * keep being sent, once that&#39;s done this clause will prevent any more from being initiated.</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span><span class="comment">     *</span></div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span><span class="comment">     * Corner case: If those queued sends indeed exist (are ongoing) then user should have a way of knowing when it&#39;s</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span><span class="comment">     * done.  That isn&#39;t the case for regular send_native_handle() calls which are silently queued up as-needed,</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span><span class="comment">     * which is why I mention it here.  So that&#39;s why in *end_sending() there&#39;s a way for</span></div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span><span class="comment">     * user to be informed (via sync callback) when everything has been sent through, or if an error stops it</span></div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span><span class="comment">     * from happening.  None of our business here though: we just refuse to do anything and emit this error. */</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span>    *err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297a42d41c622e92e9053177ba73e75633fe">error::Code::S_SENDS_FINISHED_CANNOT_SEND</a>;</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>    <span class="comment">// Note that this clause will always be reached subsequently also.</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>  }</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (meta_blob.size() &gt; <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#a00624e2fc3757012d13e3dc0feb26a21">S_MAX_META_BLOB_LENGTH</a>)</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span>  {</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>    *err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297ac416e988563e44bf15fc6a81743eef53">error::Code::S_INVALID_ARGUMENT</a>;</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Send: User argument length [&quot;</span> &lt;&lt; meta_blob.size() &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>                     <span class="stringliteral">&quot;exceeds limit [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#a00624e2fc3757012d13e3dc0feb26a21">S_MAX_META_BLOB_LENGTH</a> &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>    <span class="comment">// More WARNING logging below; just wanted to show those particular details also.</span></div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>  }</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (m_snd_pending_err_code) <span class="comment">// &amp;&amp; (!m_snd_finished) &amp;&amp; (meta_blob.size() OK)</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>  {</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>    <span class="comment">/* This --^ holds either the last inline-completed send_native_handle() call&#39;s emitted Error_code, or (rarely) one</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span><span class="comment">     * that was found while attempting to dequeue previously-would-blocked queued-up (due to incomplete s_n_h())</span></div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span><span class="comment">     * payload(s).  This may seem odd, but that&#39;s part of the design of the send interface which we wanted to be</span></div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span><span class="comment">     * as close to looking like a series of synchronous always-inline-completed send_*() calls as humanly possible,</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span><span class="comment">     * especially given that 99.9999% of the time that will indeed occur given proper behavior by the opposing</span></div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span><span class="comment">     * receiver. */</span></div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span> </div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>    FLOW_LOG_INFO(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: An error was detected earlier and saved for any subsequent &quot;</span></div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span>                  <span class="stringliteral">&quot;send attempts like this.  Will not proceed with send.  More info in WARNING below.&quot;</span>);</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>    *err_code = m_snd_pending_err_code;</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span>  }</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span>  <span class="keywordflow">else</span> <span class="comment">// if (!m_snd_finished) &amp;&amp; (meta_blob.size() OK) &amp;&amp; (!m_snd_pending_err_code)</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>  {</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span>    <span class="comment">/* As seen in protocol definition in class doc header, payload 1 contains handle, if any, and the length of</span></div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span><span class="comment">     * the blob in payload 2 (or 0 if no payload 2).  Set up the meta-length thing on the stack before entering</span></div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span><span class="comment">     * critical section.  Endianness stays constant on the machine, so don&#39;t worry about that.</span></div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span><span class="comment">     * @todo Actually it would be (1) more forward-compatible and (2) consistent to do the same as how</span></div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span><span class="comment">     * the structured layer encodes UUIDs -- mandating a pre-send conversion native-&gt;little-endian, post-send</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span><span class="comment">     * conversion backwards.  The forward-compatibility is for when this mechanism is expanded to inter-machine IPC;</span></div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span><span class="comment">     * while noting that the conversion is actually a no-op given our known hardware, so no real perf penalty. */</span></div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span>    <span class="keyword">const</span> <span class="keyword">auto</span> meta_length_raw = <a class="code hl_typedef" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a881c376f1ee37f9b1a20f770824f55d9">low_lvl_payload_blob_length_t</a>(meta_size);</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span>    <span class="comment">// ^-- must stay on stack while snd_sync_write_or_q_payload() executes, and it will.  Will be copied if must queue.</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span>    <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">Blob_const</a> meta_length_blob(&amp;meta_length_raw, <span class="keyword">sizeof</span>(meta_length_raw));</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span> </div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span>    <span class="comment">// Payload 2, if any, consists of stuff we already have ready, namely simply meta_blob itself.  Nothing to do now.</span></div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span> </div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span>    <span class="comment">// Little helper for below; handles each `(handle or none, blob)` payload.  Sets m_snd_pending_err_code.</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span>    <span class="keyword">const</span> <span class="keyword">auto</span> send_low_lvl_payload</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span>      = [&amp;](<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> idx, <a class="code hl_struct" href="structipc_1_1util_1_1Native__handle.html">Native_handle</a> payload_hndl, <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">Blob_const</a>&amp; payload_blob)</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span>    {</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span>      FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Wanted to send handle [&quot;</span> &lt;&lt; hndl_or_null &lt;&lt; <span class="stringliteral">&quot;] with &quot;</span></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span>                     <span class="stringliteral">&quot;meta-blob of size [&quot;</span> &lt;&lt; meta_blob.size() &lt;&lt; <span class="stringliteral">&quot;].  &quot;</span></div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span>                     <span class="stringliteral">&quot;About to send payload index [&quot;</span> &lt;&lt; idx &lt;&lt; <span class="stringliteral">&quot;] of &quot;</span></div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; ((meta_length_raw == 0) ? 1 : 2) &lt;&lt; <span class="stringliteral">&quot;] new low-level payloads; &quot;</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>                     <span class="stringliteral">&quot;includes handle [&quot;</span> &lt;&lt; payload_hndl &lt;&lt; <span class="stringliteral">&quot;] and &quot;</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span>                     <span class="stringliteral">&quot;low-level blob of size [&quot;</span> &lt;&lt; payload_blob.size() &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span>                     <span class="stringliteral">&quot;located @ [&quot;</span> &lt;&lt; payload_blob.data() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span> </div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span>      <span class="comment">/* As the name indicates this may synchronously finish it or queue up any parts instead to be done once</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span><span class="comment">       * a would-block clears, when user informs of this past the present function&#39;s return. */</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span>      snd_sync_write_or_q_payload(payload_hndl, payload_blob, <span class="keyword">false</span>);</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>      <span class="comment">/* That may have returned `true` indicating everything (up to and including our payload) was synchronously</span></div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span><span class="comment">       * given to kernel successfuly; or this will never occur, because outgoing-pipe-ending error was encountered.</span></div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span><span class="comment">       * Since this is send_native_handle(), we do not care: there is no on-done</span></div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span><span class="comment">       * callback to invoke, as m_snd_finished is false, as *end_sending() has not been called yet. */</span></div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span>    }; <span class="comment">// const auto send_low_lvl_payload =</span></div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span> </div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span>    <span class="comment">/* Send-or-queue each payload of which we spoke above.  There&#39;s a very high chance all of this is done inline;</span></div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span><span class="comment">     * but there&#39;s a small chance either there&#39;s either stuff queued already (we&#39;ve delegated waiting for would-block</span></div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span><span class="comment">     * to clear to user), or not but this can&#39;t fully complete (encountered would-block).  We don&#39;t care here per</span></div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span><span class="comment">     * se; I am just saying for context, to clarify what &quot;send-or-queue&quot; means. */</span></div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>    send_low_lvl_payload(1, hndl_or_null, meta_length_blob); <span class="comment">// It sets m_snd_pending_err_code.</span></div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span>    <span class="keywordflow">if</span> ((meta_length_raw != 0) &amp;&amp; (!m_snd_pending_err_code))</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>    {</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span>      send_low_lvl_payload(2, <a class="code hl_typedef" href="namespaceipc_1_1transport.html#a7ee4551983d9df16ec16a3139bac50e8">Native_handle</a>(), meta_blob); <span class="comment">// It sets m_snd_pending_err_code.</span></div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span>    }</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span> </div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span>    *err_code = m_snd_pending_err_code; <span class="comment">// Emit the new error.</span></div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span> </div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>    <span class="comment">// Did either thing generate a new error?</span></div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span>    <span class="keywordflow">if</span> (*err_code)</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span>    {</div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span>      FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Wanted to send user message but detected error &quot;</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span>                     <span class="stringliteral">&quot;synchronously.  &quot;</span></div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span>                     <span class="stringliteral">&quot;Error code details follow: [&quot;</span> &lt;&lt; *err_code &lt;&lt; <span class="stringliteral">&quot;] [&quot;</span> &lt;&lt; err_code-&gt;message() &lt;&lt; <span class="stringliteral">&quot;].  &quot;</span></div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span>                     <span class="stringliteral">&quot;Saved error code to return in next user send attempt if any, after this attempt also &quot;</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span>                     <span class="stringliteral">&quot;returns that error code synchronously first.&quot;</span>);</div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span>    }</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span>    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (m_snd_auto_ping_period != Fine_duration::zero()) <span class="comment">// &amp;&amp; (!*err_code)</span></div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span>    {</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span>      <span class="comment">/* Send requested, and there was no error; that represents non-idleness.  If auto_ping() has been called</span></div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span><span class="comment">       * (the feature is engaged), idleness shall occur at worst in m_snd_auto_ping_period; hence reschedule</span></div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span><span class="comment">       * snd_on_ev_auto_ping_now_timer_fired(). */</span></div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span> </div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span>      <span class="keyword">const</span> <span class="keywordtype">size_t</span> n_canceled = m_snd_auto_ping_timer.expires_after(m_snd_auto_ping_period);</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span> </div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span>      FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Send request from user; hence rescheduled &quot;</span></div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span>                     <span class="stringliteral">&quot;auto-ping to occur in &quot;</span></div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; round&lt;milliseconds&gt;(m_snd_auto_ping_period) &lt;&lt; <span class="stringliteral">&quot;] (will re-reschedule &quot;</span></div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span>                     <span class="stringliteral">&quot;again upon any other outgoing traffic that might be requested before then).  As a result &quot;</span></div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; n_canceled &lt;&lt; <span class="stringliteral">&quot;] previously scheduled auto-pings have been canceled; 1 is most likely; &quot;</span></div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>                     <span class="stringliteral">&quot;0 means an auto-ping is *just* about to fire (we lost the race -- which is fine).&quot;</span>);</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span>      <span class="keywordflow">if</span> (n_canceled == 1)</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span>      {</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span>        <span class="comment">/* m_timer_worker will m_snd_auto_ping_timer.async_wait(F), where F() will signal through pipe,</span></div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span><span class="comment">         * making *m_snd_auto_ping_timer_fired_peer readable.  We&#39;ve already used m_snd_ev_wait_func() to start</span></div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span><span class="comment">         * wait on it being readable and invoke snd_on_ev_auto_ping_now_timer_fired() in that case; but we&#39;ve</span></div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span><span class="comment">         * canceled the previous .async_wait() that would make it readable; so just redo that part. */</span></div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span>        m_timer_worker.timer_async_wait(&amp;m_snd_auto_ping_timer, m_snd_auto_ping_timer_fired_peer);</div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span>      }</div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span>      <span class="keywordflow">else</span></div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span>      {</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span>        assert((n_canceled == 0) &amp;&amp; <span class="stringliteral">&quot;We only invoke one timer async_wait() at a time.&quot;</span>);</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span> </div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span>        <span class="comment">/* Too late to cancel snd_on_ev_auto_ping_now_timer_fired(), so it&#39;ll just schedule next one itself.</span></div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span><span class="comment">         * Note that in practice the effect is about the same. */</span></div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span>      }</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span>    } <span class="comment">// else if (m_snd_auto_ping_period != zero) &amp;&amp; (!*err_code)</span></div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span>    <span class="comment">// else if (m_snd_auto_ping_period == zero) &amp;&amp; (!*err_code) { Auto-ping feature not engaged. }</span></div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span>  } <span class="comment">/* else if (!m_snd_finished) &amp;&amp; (meta_blob.size() OK) &amp;&amp; (!m_snd_pending_err_code)</span></div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span><span class="comment">     *         (but m_snd_pending_err_code may have become truthy inside) */</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span> </div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span>  <span class="keywordflow">if</span> (*err_code)</div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span>  {</div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span>    <span class="comment">// At the end try to categorize nature of error.</span></div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno">  258</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Wanted to send handle [&quot;</span> &lt;&lt; hndl_or_null &lt;&lt; <span class="stringliteral">&quot;] with &quot;</span></div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span>                     <span class="stringliteral">&quot;meta-blob of size [&quot;</span> &lt;&lt; meta_blob.size() &lt;&lt; <span class="stringliteral">&quot;], but an error (not necessarily new error) &quot;</span></div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno">  260</span>                     <span class="stringliteral">&quot;encountered on pipe or in user API args.  Error code details follow: &quot;</span></div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno">  261</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; *err_code &lt;&lt; <span class="stringliteral">&quot;] [&quot;</span> &lt;&lt; err_code-&gt;message() &lt;&lt; <span class="stringliteral">&quot;];  &quot;</span></div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno">  262</span>                     <span class="stringliteral">&quot;pipe hosed (sys/protocol error)? = &quot;</span></div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; ((*err_code != <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297ac416e988563e44bf15fc6a81743eef53">error::Code::S_INVALID_ARGUMENT</a>)</div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span>                             &amp;&amp; (*err_code != <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297a42d41c622e92e9053177ba73e75633fe">error::Code::S_SENDS_FINISHED_CANNOT_SEND</a>)) &lt;&lt; <span class="stringliteral">&quot;]; &quot;</span></div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno">  265</span>                     <span class="stringliteral">&quot;sending disabled by user? = &quot;</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; (*err_code == <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297a42d41c622e92e9053177ba73e75633fe">error::Code::S_SENDS_FINISHED_CANNOT_SEND</a>) &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno">  267</span>  }</div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span> </div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno">  269</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno">  270</span>} <span class="comment">// Native_socket_stream::Impl::send_native_handle()</span></div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno">  271</span> </div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#aef7a604a32db50eaf5fc501e5a205dd3">  272</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#aef7a604a32db50eaf5fc501e5a205dd3">Native_socket_stream::Impl::end_sending</a>()</div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno">  273</span>{</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno">  274</span>  <span class="keywordflow">return</span> async_end_sending_impl(<span class="keyword">nullptr</span>, flow::async::Task_asio_err());</div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno">  275</span>}</div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno">  276</span> </div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a0aca995c7150e72219b422c188d9bc23">  277</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a0aca995c7150e72219b422c188d9bc23">Native_socket_stream::Impl::async_end_sending</a>(<a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* sync_err_code_ptr,</div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno">  278</span>                                                   flow::async::Task_asio_err&amp;&amp; on_done_func)</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span>{</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno">  280</span>  <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a> sync_err_code;</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno">  281</span>  <span class="comment">// This guy either takes null/.empty(), or non-null/non-.empty(): it doesn&#39;t do the Flow-style error emission itself.</span></div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno">  282</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> ok = async_end_sending_impl(&amp;sync_err_code, std::move(on_done_func));</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno">  283</span> </div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno">  284</span>  <span class="keywordflow">if</span> (!ok)</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno">  285</span>  {</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>; <span class="comment">// False start.</span></div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span>  }</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno">  288</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno">  289</span> </div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno">  290</span>  <span class="comment">// Standard error-reporting semantics.</span></div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno">  291</span>  <span class="keywordflow">if</span> ((!sync_err_code_ptr) &amp;&amp; sync_err_code)</div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno">  292</span>  {</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno">  293</span>    <span class="keywordflow">throw</span> flow::error::Runtime_error(sync_err_code, <span class="stringliteral">&quot;Native_socket_stream::Impl::async_end_sending()&quot;</span>);</div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno">  294</span>  }</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno">  295</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno">  296</span>  sync_err_code_ptr &amp;&amp; (*sync_err_code_ptr = sync_err_code);</div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno">  297</span>  <span class="comment">// And if (!sync_err_code_ptr) + no error =&gt; no throw.</span></div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno">  298</span> </div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno">  299</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno">  300</span>} <span class="comment">// Native_socket_stream::Impl::async_end_sending()</span></div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno">  301</span> </div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a6337b0d5d703f124def66853e36b62e5">  302</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a6337b0d5d703f124def66853e36b62e5">Native_socket_stream::Impl::async_end_sending_impl</a>(<a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* sync_err_code_ptr_or_null,</div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno">  303</span>                                                        flow::async::Task_asio_err&amp;&amp; on_done_func_or_empty)</div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno">  304</span>{</div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno">  305</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">util::Blob_const</a>;</div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno">  306</span>  <span class="keyword">using </span>flow::async::Task_asio_err;</div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno">  307</span> </div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno">  308</span>  assert(<span class="keywordtype">bool</span>(sync_err_code_ptr_or_null) == (!on_done_func_or_empty.empty()));</div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno">  309</span> </div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno">  310</span>  <span class="comment">// We comment liberally, but tactically, inline; but please read the strategy in the class doc header&#39;s impl section.</span></div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno">  311</span> </div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno">  312</span>  <span class="keywordflow">if</span> ((!op_started&lt;Op::S_SND&gt;(<span class="stringliteral">&quot;async_end_sending()&quot;</span>)) || (!state_peer(<span class="stringliteral">&quot;async_end_sending()&quot;</span>)))</div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno">  313</span>  {</div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno">  314</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno">  315</span>  }</div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno">  316</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno">  317</span> </div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno">  318</span>  <span class="comment">/* Went back and forth on this semantic.  Choices, if m_snd_finished==true already, were:</span></div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno">  319</span><span class="comment">   *   -1- Just return.  Never call on_done_func_or_empty() either.</span></div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno">  320</span><span class="comment">   *   -2- on_done_func_or_empty().</span></div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno">  321</span><span class="comment">   *     -a- Could pass success Error_code.</span></div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno">  322</span><span class="comment">   *     -b- Could pass some new special Error_code for doubly-ending sends.</span></div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno">  323</span><span class="comment">   *   -3- Just assert(false) -- undefined behavior.</span></div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno">  324</span><span class="comment">   *   -4- Just return... but return false or something.</span></div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno">  325</span><span class="comment">   *</span></div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno">  326</span><span class="comment">   * 1 is out, because then they might be expecting it to be called, and it&#39;s never called; and since they can&#39;t solve</span></div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno">  327</span><span class="comment">   * the halting problem, they could never know that it won&#39;t be called; of course they shouldn&#39;t be calling us in the</span></div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno">  328</span><span class="comment">   * first place... but if they DID call us then presumably it&#39;s because it was a mistake, or they want to find out.</span></div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno">  329</span><span class="comment">   * In the latter case, they&#39;re messed over; so 1 is out.</span></div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno">  330</span><span class="comment">   *</span></div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno">  331</span><span class="comment">   * (Note there is NO other way m_snd_finished becomes true.)</span></div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno">  332</span><span class="comment">   *</span></div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno">  333</span><span class="comment">   * 2b seems annoying -- an entirely new error code for something that&#39;s most likely an easily avoidable mistake</span></div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno">  334</span><span class="comment">   * (though could reuse S_SENDS_FINISHED_CANNOT_SEND or S_INVALID_ARGUMENT...); and if they&#39;re trying to determine</span></div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno">  335</span><span class="comment">   * *if* they&#39;d already called it, then doing it via async handler is annoying from user&#39;s PoV and much better done</span></div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno">  336</span><span class="comment">   * with an accessor synchronously.  Most importantly it breaks the normal pattern, wherein asynchronously reported</span></div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno">  337</span><span class="comment">   * errors are asynchronously encountered (system) conditions, which this isn&#39;t; it&#39;s just meh.  Not awful but meh.</span></div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno">  338</span><span class="comment">   *</span></div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno">  339</span><span class="comment">   * 2a is pretty good for the user.  Though it won&#39;t indicate there was a problem... but on the other hand who cares?</span></div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno">  340</span><span class="comment">   * However, internally it creates another async flow which would require some reasoning to ensure it doesn&#39;t interact</span></div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno">  341</span><span class="comment">   * in some way with the rest of the outgoing direction (and incoming for that matter).  It&#39;d be annoying to have</span></div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno">  342</span><span class="comment">   * to think hard for such a dinky scenario.</span></div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno">  343</span><span class="comment">   *</span></div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno">  344</span><span class="comment">   * 3 is pretty good.  Implementation-wise it&#39;s by far the easiest.  Usage-wise, the user just needs to not make the</span></div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno">  345</span><span class="comment">   * obvious error of calling it twice.  This can be done with their own flag if desired.  This seems sufficient, though</span></div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno">  346</span><span class="comment">   * through experience we may determine otherwise ultimately which would require an API change, and that&#39;d suck a bit.</span></div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno">  347</span><span class="comment">   *</span></div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno">  348</span><span class="comment">   * 4 is pretty good.  The interface is a little less clean, but if the user wouldn&#39;t cause the assert() in 3, then</span></div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno">  349</span><span class="comment">   * they can exactly equally ignore the return value in 4 or assert() on it themselves.  It also allows the user to</span></div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno">  350</span><span class="comment">   * detect the mistake easily.</span></div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno">  351</span><span class="comment">   *</span></div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno">  352</span><span class="comment">   * So 3 and 4 seem the best, and 4 is more robust at the cost of a small diff in interface complexity. */</span></div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno">  353</span>  <span class="keywordflow">if</span> (m_snd_finished)</div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno">  354</span>  {</div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno">  355</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wants to end sending, but we&#39;re in sends-finished &quot;</span></div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno">  356</span>                     <span class="stringliteral">&quot;state already.  Ignoring.&quot;</span>);</div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno">  357</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno">  358</span>  }</div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno">  359</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno">  360</span>  m_snd_finished = <span class="keyword">true</span>; <span class="comment">// Cause future send_native_handle() to emit S_SENDS_FINISHED_CANNOT_SEND and return.</span></div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno">  361</span> </div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno">  362</span>  <span class="keywordtype">bool</span> qd; <span class="comment">// Set to false to report results *now*: basically true &lt;=&gt; stuff is still queued to send.</span></div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno">  363</span>  <span class="keywordflow">if</span> (m_snd_pending_err_code)</div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno">  364</span>  {</div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno">  365</span>    qd = <span class="keyword">false</span>; <span class="comment">// There was outgoing-pipe-ending error detected before us; so should immediately report.</span></div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno">  366</span>  }</div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno">  367</span>  <span class="keywordflow">else</span></div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno">  368</span>  {</div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno">  369</span>    <span class="comment">// Save this to emit once everything (including the thing we just made) has been sent off.  Or not if empty.</span></div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno">  370</span>    assert(m_snd_pending_on_last_send_done_func_or_empty.empty());</div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno">  371</span>    m_snd_pending_on_last_send_done_func_or_empty = std::move(on_done_func_or_empty);</div>
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno">  372</span>    <span class="comment">// on_done_func_or_empty is potentially hosed now.</span></div>
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno">  373</span> </div>
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno">  374</span>    <span class="comment">/* Prepare/send the payload per aforementioned (class doc header) strategy: no handle, and a 0x0000 integer.</span></div>
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno">  375</span><span class="comment">     * Keeping comments light, as this is essentially a much simplified version of send_native_handle(). */</span></div>
<div class="line"><a id="l00376" name="l00376"></a><span class="lineno">  376</span> </div>
<div class="line"><a id="l00377" name="l00377"></a><span class="lineno">  377</span>    <span class="keyword">const</span> <span class="keyword">auto</span> ZERO_SIZE_RAW = <a class="code hl_typedef" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a881c376f1ee37f9b1a20f770824f55d9">low_lvl_payload_blob_length_t</a>(0);</div>
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno">  378</span>    <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">Blob_const</a> blob_with_0(&amp;ZERO_SIZE_RAW, <span class="keyword">sizeof</span>(ZERO_SIZE_RAW));</div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno">  379</span> </div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno">  380</span>    <span class="comment">/* snd_sync_write_or_q_payload():</span></div>
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno">  381</span><span class="comment">     * Returns true =&gt; out-queue flushed successfully; or error detected.</span></div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno">  382</span><span class="comment">     *   =&gt; report synchronously now.  (Unless they don&#39;t care about any such report.)</span></div>
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno">  383</span><span class="comment">     * Returns false =&gt; out-queue has stuff in it and will continue to, until transport is writable.</span></div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno">  384</span><span class="comment">     *   =&gt; cannot report completion yet. */</span></div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno">  385</span> </div>
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno">  386</span>    qd = !snd_sync_write_or_q_payload(<a class="code hl_typedef" href="namespaceipc_1_1transport.html#a7ee4551983d9df16ec16a3139bac50e8">Native_handle</a>(), blob_with_0, <span class="keyword">false</span>);</div>
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno">  387</span>    <span class="keywordflow">if</span> (qd &amp;&amp; sync_err_code_ptr_or_null)</div>
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno">  388</span>    {</div>
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno">  389</span>      <span class="comment">/* It has not been flushed (we will return would-block).</span></div>
<div class="line"><a id="l00390" name="l00390"></a><span class="lineno">  390</span><span class="comment">       * Save this to emit once everything (including the thing we just made) has been sent off, since</span></div>
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno">  391</span><span class="comment">       * they care about completion (sync_err_code_ptr_or_null not null). */</span></div>
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno">  392</span>      assert(m_snd_pending_on_last_send_done_func_or_empty.empty());</div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno">  393</span>      m_snd_pending_on_last_send_done_func_or_empty = std::move(on_done_func_or_empty);</div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno">  394</span>      <span class="comment">// on_done_func_or_empty is potentially hosed now.</span></div>
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno">  395</span>    }</div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno">  396</span>    <span class="comment">/* else if (qd &amp;&amp; (!sync_err_code_ptr_or_null))</span></div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno">  397</span><span class="comment">     *   { on_done_func_or_empty is .empty() anyway.  Anyway they don&#39;t care about emitting result.  Done:</span></div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno">  398</span><span class="comment">     *     It&#39;ll be async-sent when/if possible. }</span></div>
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno">  399</span><span class="comment">     * else if (!qd)</span></div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno">  400</span><span class="comment">     *   { All flushed synchronously.  We will emit it synchronously, if they&#39;re interested in that. } */</span></div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno">  401</span>  } <span class="comment">// if (!m_snd_pending_err_code) (but it may have become truthy inside)</span></div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno">  402</span> </div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno">  403</span>  <span class="comment">// Log the error, if any; report the result synchronously if applicable.</span></div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno">  404</span> </div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno">  405</span>  <span class="keywordflow">if</span> (m_snd_pending_err_code)</div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno">  406</span>  {</div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno">  407</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wanted to end sending, but an error (not necessarily &quot;</span></div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno">  408</span>                     <span class="stringliteral">&quot;new error) encountered on pipe synchronously when trying to send graceful-close.  &quot;</span></div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno">  409</span>                     <span class="stringliteral">&quot;Nevertheless locally sends-finished state is now active.  Will report completion via &quot;</span></div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno">  410</span>                     <span class="stringliteral">&quot;sync-args (if any).  Error code details follow: &quot;</span></div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno">  411</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; m_snd_pending_err_code &lt;&lt; <span class="stringliteral">&quot;] [&quot;</span> &lt;&lt; m_snd_pending_err_code.message() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno">  412</span>    assert(!qd);</div>
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno">  413</span>  }</div>
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno">  414</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (qd)</div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno">  415</span>  {</div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno">  416</span>    FLOW_LOG_INFO(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wanted to end sending.  Success so far but out-queue &quot;</span></div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno">  417</span>                  <span class="stringliteral">&quot;has payloads -- at least the graceful-close payload -- still pending while waiting for &quot;</span></div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno">  418</span>                  <span class="stringliteral">&quot;writability.  Locally sends-finished state is now active, and the other side will be informed &quot;</span></div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno">  419</span>                  <span class="stringliteral">&quot;of this barring subsequent system errors.  &quot;</span></div>
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno">  420</span>                  <span class="stringliteral">&quot;We cannot report completion via sync-args (if any).&quot;</span>);</div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno">  421</span>  }</div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno">  422</span>  <span class="keywordflow">else</span> <span class="comment">// if ((!m_snd_pending_err_code) &amp;&amp; (!qd))</span></div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno">  423</span>  {</div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno">  424</span>    FLOW_LOG_INFO(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wanted to end sending.  Immediate success: out-queue &quot;</span></div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno">  425</span>                  <span class="stringliteral">&quot;flushed permanently.  &quot;</span></div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno">  426</span>                  <span class="stringliteral">&quot;Locally sends-finished state is now active, and the other side will be informed of this.  &quot;</span></div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno">  427</span>                  <span class="stringliteral">&quot;Locally will report completion via sync-args (if any).&quot;</span>);</div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno">  428</span>  }</div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno">  429</span> </div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno">  430</span>  <span class="keywordflow">if</span> (sync_err_code_ptr_or_null)</div>
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno">  431</span>  {</div>
<div class="line"><a id="l00432" name="l00432"></a><span class="lineno">  432</span>    *sync_err_code_ptr_or_null = qd ? <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297aa667487757f9d6300f6888bac40bcc24">error::Code::S_SYNC_IO_WOULD_BLOCK</a></div>
<div class="line"><a id="l00433" name="l00433"></a><span class="lineno">  433</span>                                    : m_snd_pending_err_code; <span class="comment">// Could be falsy (probably is usually).</span></div>
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno">  434</span>  }</div>
<div class="line"><a id="l00435" name="l00435"></a><span class="lineno">  435</span>  <span class="comment">// else { Don&#39;t care about completion. }</span></div>
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno">  436</span> </div>
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno">  437</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno">  438</span>} <span class="comment">// Native_socket_stream::Impl::async_end_sending_impl()</span></div>
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno">  439</span> </div>
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#ab7b382067804495cbae180a5bc1a2757">  440</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#ab7b382067804495cbae180a5bc1a2757">Native_socket_stream::Impl::auto_ping</a>(<a class="code hl_typedef" href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">util::Fine_duration</a> period)</div>
<div class="line"><a id="l00441" name="l00441"></a><span class="lineno">  441</span>{</div>
<div class="line"><a id="l00442" name="l00442"></a><span class="lineno">  442</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">util::Blob_const</a>;</div>
<div class="line"><a id="l00443" name="l00443"></a><span class="lineno">  443</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">util::Fine_duration</a>;</div>
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno">  444</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a31e67d3a017477a04b313927e2f2c733">util::Task</a>;</div>
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno">  445</span>  <span class="keyword">using </span>boost::chrono::round;</div>
<div class="line"><a id="l00446" name="l00446"></a><span class="lineno">  446</span>  <span class="keyword">using </span>boost::chrono::milliseconds;</div>
<div class="line"><a id="l00447" name="l00447"></a><span class="lineno">  447</span> </div>
<div class="line"><a id="l00448" name="l00448"></a><span class="lineno">  448</span>  <span class="keywordflow">if</span> ((!op_started&lt;Op::S_SND&gt;(<span class="stringliteral">&quot;auto_ping()&quot;</span>)) || (!state_peer(<span class="stringliteral">&quot;auto_ping()&quot;</span>)))</div>
<div class="line"><a id="l00449" name="l00449"></a><span class="lineno">  449</span>  {</div>
<div class="line"><a id="l00450" name="l00450"></a><span class="lineno">  450</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00451" name="l00451"></a><span class="lineno">  451</span>  }</div>
<div class="line"><a id="l00452" name="l00452"></a><span class="lineno">  452</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00453" name="l00453"></a><span class="lineno">  453</span> </div>
<div class="line"><a id="l00454" name="l00454"></a><span class="lineno">  454</span>  assert(period.count() &gt; 0);</div>
<div class="line"><a id="l00455" name="l00455"></a><span class="lineno">  455</span> </div>
<div class="line"><a id="l00456" name="l00456"></a><span class="lineno">  456</span>  <span class="keywordflow">if</span> (m_snd_finished)</div>
<div class="line"><a id="l00457" name="l00457"></a><span class="lineno">  457</span>  {</div>
<div class="line"><a id="l00458" name="l00458"></a><span class="lineno">  458</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wants to start auto-pings, but we&#39;re in &quot;</span></div>
<div class="line"><a id="l00459" name="l00459"></a><span class="lineno">  459</span>                     <span class="stringliteral">&quot;sends-finished state already.  Ignoring.&quot;</span>);</div>
<div class="line"><a id="l00460" name="l00460"></a><span class="lineno">  460</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno">  461</span>  }</div>
<div class="line"><a id="l00462" name="l00462"></a><span class="lineno">  462</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00463" name="l00463"></a><span class="lineno">  463</span> </div>
<div class="line"><a id="l00464" name="l00464"></a><span class="lineno">  464</span>  <span class="comment">/* By concept requirements we are to do 2 things: send an auto-ping now as a baseline; and then make it so</span></div>
<div class="line"><a id="l00465" name="l00465"></a><span class="lineno">  465</span><span class="comment">   * *some* message (auto-ping or otherwise) is sent at least every `period` until *end_sending() or error. */</span></div>
<div class="line"><a id="l00466" name="l00466"></a><span class="lineno">  466</span> </div>
<div class="line"><a id="l00467" name="l00467"></a><span class="lineno">  467</span>  <span class="comment">/* Prepare the payload per class doc header strategy: no handle, and a 0xFFFF... integer.</span></div>
<div class="line"><a id="l00468" name="l00468"></a><span class="lineno">  468</span><span class="comment">   * Keeping comments somewhat light, as this is essentially a much simplified version of send_native_handle()</span></div>
<div class="line"><a id="l00469" name="l00469"></a><span class="lineno">  469</span><span class="comment">   * and is very similar to what async_end_sending() does in this spot. */</span></div>
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno">  470</span> </div>
<div class="line"><a id="l00471" name="l00471"></a><span class="lineno">  471</span>  <span class="keywordflow">if</span> (m_snd_auto_ping_period != Fine_duration::zero())</div>
<div class="line"><a id="l00472" name="l00472"></a><span class="lineno">  472</span>  {</div>
<div class="line"><a id="l00473" name="l00473"></a><span class="lineno">  473</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wants to start auto-pings, but this &quot;</span></div>
<div class="line"><a id="l00474" name="l00474"></a><span class="lineno">  474</span>                     <span class="stringliteral">&quot;has already been engaged earlier.  Ignoring.&quot;</span>);</div>
<div class="line"><a id="l00475" name="l00475"></a><span class="lineno">  475</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00476" name="l00476"></a><span class="lineno">  476</span>  }</div>
<div class="line"><a id="l00477" name="l00477"></a><span class="lineno">  477</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00478" name="l00478"></a><span class="lineno">  478</span>  m_snd_auto_ping_period = period; <span class="comment">// Remember this, both as flag (non-zero()) and to know how often to reschedule it.</span></div>
<div class="line"><a id="l00479" name="l00479"></a><span class="lineno">  479</span> </div>
<div class="line"><a id="l00480" name="l00480"></a><span class="lineno">  480</span>  FLOW_LOG_INFO(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wants to start auto-pings so that there are &quot;</span></div>
<div class="line"><a id="l00481" name="l00481"></a><span class="lineno">  481</span>                <span class="stringliteral">&quot;outgoing messages at least as frequently as every &quot;</span></div>
<div class="line"><a id="l00482" name="l00482"></a><span class="lineno">  482</span>                <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; round&lt;milliseconds&gt;(m_snd_auto_ping_period) &lt;&lt; <span class="stringliteral">&quot;].  Sending baseline auto-ping and scheduling &quot;</span></div>
<div class="line"><a id="l00483" name="l00483"></a><span class="lineno">  483</span>                <span class="stringliteral">&quot;first subsequent auto-ping; it may be rescheduled if more user traffic occurs before then.&quot;</span>);</div>
<div class="line"><a id="l00484" name="l00484"></a><span class="lineno">  484</span> </div>
<div class="line"><a id="l00485" name="l00485"></a><span class="lineno">  485</span>  <span class="keywordflow">if</span> (m_snd_pending_err_code)</div>
<div class="line"><a id="l00486" name="l00486"></a><span class="lineno">  486</span>  {</div>
<div class="line"><a id="l00487" name="l00487"></a><span class="lineno">  487</span>    <span class="comment">/* Concept does not require us to report any error via auto_ping() itself.  It&#39;s for receiver&#39;s benefit anyway.</span></div>
<div class="line"><a id="l00488" name="l00488"></a><span class="lineno">  488</span><span class="comment">     * The local user will discover it, assuming they have interest, via the next send_*() or *end_sending(). */</span></div>
<div class="line"><a id="l00489" name="l00489"></a><span class="lineno">  489</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User wanted to start auto-pings, but an error was &quot;</span></div>
<div class="line"><a id="l00490" name="l00490"></a><span class="lineno">  490</span>                     <span class="stringliteral">&quot;previously encountered on pipe; so will not auto-ping.  &quot;</span></div>
<div class="line"><a id="l00491" name="l00491"></a><span class="lineno">  491</span>                     <span class="stringliteral">&quot;Error code details follow: [&quot;</span> &lt;&lt; m_snd_pending_err_code &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00492" name="l00492"></a><span class="lineno">  492</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; m_snd_pending_err_code.message() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00493" name="l00493"></a><span class="lineno">  493</span>    <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00494" name="l00494"></a><span class="lineno">  494</span>  }</div>
<div class="line"><a id="l00495" name="l00495"></a><span class="lineno">  495</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00496" name="l00496"></a><span class="lineno">  496</span> </div>
<div class="line"><a id="l00497" name="l00497"></a><span class="lineno">  497</span>  <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">Blob_const</a> blob_with_ff(&amp;S_META_BLOB_LENGTH_PING_SENTINEL, <span class="keyword">sizeof</span>(S_META_BLOB_LENGTH_PING_SENTINEL));</div>
<div class="line"><a id="l00498" name="l00498"></a><span class="lineno">  498</span> </div>
<div class="line"><a id="l00499" name="l00499"></a><span class="lineno">  499</span>  <span class="comment">/* Important: avoid_qing=true for reasons explained in its doc header.  Namely:</span></div>
<div class="line"><a id="l00500" name="l00500"></a><span class="lineno">  500</span><span class="comment">   * If blob_with_ff would-block entirely, then there are already data that would signal-non-idleness sitting</span></div>
<div class="line"><a id="l00501" name="l00501"></a><span class="lineno">  501</span><span class="comment">   * in the kernel buffer, so the auto-ping can be safely dropped in that case. */</span></div>
<div class="line"><a id="l00502" name="l00502"></a><span class="lineno">  502</span>  snd_sync_write_or_q_payload(<a class="code hl_typedef" href="namespaceipc_1_1transport.html#a7ee4551983d9df16ec16a3139bac50e8">Native_handle</a>(), blob_with_ff, <span class="keyword">true</span>);</div>
<div class="line"><a id="l00503" name="l00503"></a><span class="lineno">  503</span>  <span class="keywordflow">if</span> (m_snd_pending_err_code)</div>
<div class="line"><a id="l00504" name="l00504"></a><span class="lineno">  504</span>  {</div>
<div class="line"><a id="l00505" name="l00505"></a><span class="lineno">  505</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Wanted to send initial auto-ping but detected error &quot;</span></div>
<div class="line"><a id="l00506" name="l00506"></a><span class="lineno">  506</span>                     <span class="stringliteral">&quot;synchronously.  &quot;</span></div>
<div class="line"><a id="l00507" name="l00507"></a><span class="lineno">  507</span>                     <span class="stringliteral">&quot;Error code details follow: [&quot;</span> &lt;&lt; m_snd_pending_err_code &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00508" name="l00508"></a><span class="lineno">  508</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; m_snd_pending_err_code.message() &lt;&lt; <span class="stringliteral">&quot;].  &quot;</span></div>
<div class="line"><a id="l00509" name="l00509"></a><span class="lineno">  509</span>                     <span class="stringliteral">&quot;Saved error code to return in next user send attempt if any; otherwise ignoring; &quot;</span></div>
<div class="line"><a id="l00510" name="l00510"></a><span class="lineno">  510</span>                     <span class="stringliteral">&quot;will not schedule periodic auto-pings.&quot;</span>);</div>
<div class="line"><a id="l00511" name="l00511"></a><span class="lineno">  511</span>    <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00512" name="l00512"></a><span class="lineno">  512</span>  }</div>
<div class="line"><a id="l00513" name="l00513"></a><span class="lineno">  513</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00514" name="l00514"></a><span class="lineno">  514</span> </div>
<div class="line"><a id="l00515" name="l00515"></a><span class="lineno">  515</span>  <span class="comment">// Initial auto-ping partially- or fully-sent fine (anything unsent was queued).  Now schedule next one per above.</span></div>
<div class="line"><a id="l00516" name="l00516"></a><span class="lineno">  516</span> </div>
<div class="line"><a id="l00517" name="l00517"></a><span class="lineno">  517</span>  <span class="comment">/* Now we can schedule it, similarly to send_native_handle() and snd_on_ev_auto_ping_now_timer_fired() itself.</span></div>
<div class="line"><a id="l00518" name="l00518"></a><span class="lineno">  518</span><span class="comment">   * Recall that we can&#39;t simply .async_wait(F) on some timer and have the desired code --</span></div>
<div class="line"><a id="l00519" name="l00519"></a><span class="lineno">  519</span><span class="comment">   * snd_on_ev_auto_ping_now_timer_fired() which sends the ping -- be the handler F.  We have to use the sync_io</span></div>
<div class="line"><a id="l00520" name="l00520"></a><span class="lineno">  520</span><span class="comment">   * pattern, where the user waits on events for us... but there&#39;s no timer FD, so we do it in the separate thread and</span></div>
<div class="line"><a id="l00521" name="l00521"></a><span class="lineno">  521</span><span class="comment">   * then ping via a pipe.  (This is all discussed elsewhere, but yes, timerfd_*() is available; the boost.asio</span></div>
<div class="line"><a id="l00522" name="l00522"></a><span class="lineno">  522</span><span class="comment">   * timer API is much nicer however -- and while it appears to use timerfd_*() at least optionally, this</span></div>
<div class="line"><a id="l00523" name="l00523"></a><span class="lineno">  523</span><span class="comment">   * functionality is not exposed via .native_handle() or something.  But I digress!!!  Discussed elsewhere.) */</span></div>
<div class="line"><a id="l00524" name="l00524"></a><span class="lineno">  524</span> </div>
<div class="line"><a id="l00525" name="l00525"></a><span class="lineno">  525</span>  m_snd_ev_wait_func(&amp;m_snd_ev_wait_hndl_auto_ping_timer_fired_peer,</div>
<div class="line"><a id="l00526" name="l00526"></a><span class="lineno">  526</span>                     <span class="keyword">false</span>, <span class="comment">// Wait for read.</span></div>
<div class="line"><a id="l00527" name="l00527"></a><span class="lineno">  527</span>                     <span class="comment">// Once readable do this: pop pipe; send ping; schedule again.</span></div>
<div class="line"><a id="l00528" name="l00528"></a><span class="lineno">  528</span>                     boost::make_shared&lt;Task&gt;</div>
<div class="line"><a id="l00529" name="l00529"></a><span class="lineno">  529</span>                       ([<span class="keyword">this</span>]() { snd_on_ev_auto_ping_now_timer_fired(); }));</div>
<div class="line"><a id="l00530" name="l00530"></a><span class="lineno">  530</span>  <span class="comment">/* Reminder: That has no effect (other than user recording stuff) until this method returns.</span></div>
<div class="line"><a id="l00531" name="l00531"></a><span class="lineno">  531</span><span class="comment">   * So it cannot execute concurrently or anything.  They&#39;d need to do their poll()/epoll_wait() or do so</span></div>
<div class="line"><a id="l00532" name="l00532"></a><span class="lineno">  532</span><span class="comment">   * indirectly by returning from the present boost.asio task (if they&#39;re running a boost.asio event loop). */</span></div>
<div class="line"><a id="l00533" name="l00533"></a><span class="lineno">  533</span> </div>
<div class="line"><a id="l00534" name="l00534"></a><span class="lineno">  534</span>  <span class="comment">/* Set up the actual timer.  The second call really does m_snd_auto_ping_timer.async_wait().</span></div>
<div class="line"><a id="l00535" name="l00535"></a><span class="lineno">  535</span><span class="comment">   * Note that could fire immediately, even concurrently (if m_snd_auto_ping_period is somehow insanely short,</span></div>
<div class="line"><a id="l00536" name="l00536"></a><span class="lineno">  536</span><span class="comment">   * and the timer resolution is amazing)... but it would only cause snd_on_ev_auto_ping_now_timer_fired()</span></div>
<div class="line"><a id="l00537" name="l00537"></a><span class="lineno">  537</span><span class="comment">   * once they detect the pipe-readable event, which (again) can only happen after we return. */</span></div>
<div class="line"><a id="l00538" name="l00538"></a><span class="lineno">  538</span>  m_snd_auto_ping_timer.expires_after(m_snd_auto_ping_period);</div>
<div class="line"><a id="l00539" name="l00539"></a><span class="lineno">  539</span>  m_timer_worker.timer_async_wait(&amp;m_snd_auto_ping_timer, m_snd_auto_ping_timer_fired_peer);</div>
<div class="line"><a id="l00540" name="l00540"></a><span class="lineno">  540</span> </div>
<div class="line"><a id="l00541" name="l00541"></a><span class="lineno">  541</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00542" name="l00542"></a><span class="lineno">  542</span>} <span class="comment">// Native_socket_stream::Impl::auto_ping()</span></div>
<div class="line"><a id="l00543" name="l00543"></a><span class="lineno">  543</span> </div>
<div class="line"><a id="l00544" name="l00544"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a4b31da3a7ff63f307bd08e288c391556">  544</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a4b31da3a7ff63f307bd08e288c391556">Native_socket_stream::Impl::snd_on_ev_auto_ping_now_timer_fired</a>()</div>
<div class="line"><a id="l00545" name="l00545"></a><span class="lineno">  545</span>{</div>
<div class="line"><a id="l00546" name="l00546"></a><span class="lineno">  546</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">util::Blob_const</a>;</div>
<div class="line"><a id="l00547" name="l00547"></a><span class="lineno">  547</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a31e67d3a017477a04b313927e2f2c733">util::Task</a>;</div>
<div class="line"><a id="l00548" name="l00548"></a><span class="lineno">  548</span> </div>
<div class="line"><a id="l00549" name="l00549"></a><span class="lineno">  549</span>  <span class="comment">/* This is an event handler!  Specifically for the *m_snd_auto_ping_timer_fired_peer pipe reader being</span></div>
<div class="line"><a id="l00550" name="l00550"></a><span class="lineno">  550</span><span class="comment">   * readable.  To avoid infinite-loopiness, we&#39;d best pop the thing that was written there. */</span></div>
<div class="line"><a id="l00551" name="l00551"></a><span class="lineno">  551</span>  m_timer_worker.consume_timer_firing_signal(m_snd_auto_ping_timer_fired_peer);</div>
<div class="line"><a id="l00552" name="l00552"></a><span class="lineno">  552</span> </div>
<div class="line"><a id="l00553" name="l00553"></a><span class="lineno">  553</span>  <span class="comment">// Now do the auto-ping itself.</span></div>
<div class="line"><a id="l00554" name="l00554"></a><span class="lineno">  554</span> </div>
<div class="line"><a id="l00555" name="l00555"></a><span class="lineno">  555</span>  <span class="keywordflow">if</span> (m_snd_pending_err_code)</div>
<div class="line"><a id="l00556" name="l00556"></a><span class="lineno">  556</span>  {</div>
<div class="line"><a id="l00557" name="l00557"></a><span class="lineno">  557</span>    <span class="comment">/* Concept does not require us to report any error via auto_ping() itself.  It&#39;s for receiver&#39;s benefit anyway.</span></div>
<div class="line"><a id="l00558" name="l00558"></a><span class="lineno">  558</span><span class="comment">     * The local user will discover it, assuming they have interest, via the next send_*() or *end_sending(). */</span></div>
<div class="line"><a id="l00559" name="l00559"></a><span class="lineno">  559</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Auto-ping timer fired, but an error was &quot;</span></div>
<div class="line"><a id="l00560" name="l00560"></a><span class="lineno">  560</span>                     <span class="stringliteral">&quot;previously encountered in 2-way pipe; so will neither auto-ping nor schedule next auto-ping.  &quot;</span></div>
<div class="line"><a id="l00561" name="l00561"></a><span class="lineno">  561</span>                     <span class="stringliteral">&quot;Error code details follow: [&quot;</span> &lt;&lt; m_snd_pending_err_code &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00562" name="l00562"></a><span class="lineno">  562</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; m_snd_pending_err_code.message() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00563" name="l00563"></a><span class="lineno">  563</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00564" name="l00564"></a><span class="lineno">  564</span>  }</div>
<div class="line"><a id="l00565" name="l00565"></a><span class="lineno">  565</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00566" name="l00566"></a><span class="lineno">  566</span> </div>
<div class="line"><a id="l00567" name="l00567"></a><span class="lineno">  567</span>  <span class="keywordflow">if</span> (m_snd_finished)</div>
<div class="line"><a id="l00568" name="l00568"></a><span class="lineno">  568</span>  {</div>
<div class="line"><a id="l00569" name="l00569"></a><span class="lineno">  569</span>    <span class="comment">// This is liable to be quite common and not of much interest at the INFO level; though it&#39;s not that verbose.</span></div>
<div class="line"><a id="l00570" name="l00570"></a><span class="lineno">  570</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00571" name="l00571"></a><span class="lineno">  571</span>                   <span class="stringliteral">&quot;Auto-ping timer fired; but graceful-close API earlier instructed us to no-op.  No-op.&quot;</span>);</div>
<div class="line"><a id="l00572" name="l00572"></a><span class="lineno">  572</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00573" name="l00573"></a><span class="lineno">  573</span>  }</div>
<div class="line"><a id="l00574" name="l00574"></a><span class="lineno">  574</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00575" name="l00575"></a><span class="lineno">  575</span> </div>
<div class="line"><a id="l00576" name="l00576"></a><span class="lineno">  576</span>  <span class="comment">// This may be of some interest sufficient for INFO.  @todo Reconsider due to non-trivial verbosity possibly.</span></div>
<div class="line"><a id="l00577" name="l00577"></a><span class="lineno">  577</span>  FLOW_LOG_INFO(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00578" name="l00578"></a><span class="lineno">  578</span>                <span class="stringliteral">&quot;Auto-ping timer fired; sending/queueing auto-ping; scheduling for next time; it may be &quot;</span></div>
<div class="line"><a id="l00579" name="l00579"></a><span class="lineno">  579</span>                <span class="stringliteral">&quot;rescheduled if more user traffic occurs before then.&quot;</span>);</div>
<div class="line"><a id="l00580" name="l00580"></a><span class="lineno">  580</span> </div>
<div class="line"><a id="l00581" name="l00581"></a><span class="lineno">  581</span>  <span class="comment">// The next code is similar to the initial auto_ping().  Keeping comments light.</span></div>
<div class="line"><a id="l00582" name="l00582"></a><span class="lineno">  582</span> </div>
<div class="line"><a id="l00583" name="l00583"></a><span class="lineno">  583</span>  <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">Blob_const</a> blob_with_ff{&amp;S_META_BLOB_LENGTH_PING_SENTINEL, <span class="keyword">sizeof</span>(S_META_BLOB_LENGTH_PING_SENTINEL)};</div>
<div class="line"><a id="l00584" name="l00584"></a><span class="lineno">  584</span> </div>
<div class="line"><a id="l00585" name="l00585"></a><span class="lineno">  585</span>  snd_sync_write_or_q_payload(<a class="code hl_typedef" href="namespaceipc_1_1transport.html#a7ee4551983d9df16ec16a3139bac50e8">Native_handle</a>(), blob_with_ff, <span class="keyword">true</span>);</div>
<div class="line"><a id="l00586" name="l00586"></a><span class="lineno">  586</span>  <span class="keywordflow">if</span> (m_snd_pending_err_code)</div>
<div class="line"><a id="l00587" name="l00587"></a><span class="lineno">  587</span>  {</div>
<div class="line"><a id="l00588" name="l00588"></a><span class="lineno">  588</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Wanted to send non-initial auto-ping but detected error &quot;</span></div>
<div class="line"><a id="l00589" name="l00589"></a><span class="lineno">  589</span>                     <span class="stringliteral">&quot;synchronously.  &quot;</span></div>
<div class="line"><a id="l00590" name="l00590"></a><span class="lineno">  590</span>                     <span class="stringliteral">&quot;Error code details follow: [&quot;</span> &lt;&lt; m_snd_pending_err_code &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00591" name="l00591"></a><span class="lineno">  591</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; m_snd_pending_err_code.message() &lt;&lt; <span class="stringliteral">&quot;].  &quot;</span></div>
<div class="line"><a id="l00592" name="l00592"></a><span class="lineno">  592</span>                     <span class="stringliteral">&quot;Saved error code to return in next user send attempt if any; otherwise ignoring; &quot;</span></div>
<div class="line"><a id="l00593" name="l00593"></a><span class="lineno">  593</span>                     <span class="stringliteral">&quot;will not continue scheduling periodic auto-pings.&quot;</span>);</div>
<div class="line"><a id="l00594" name="l00594"></a><span class="lineno">  594</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00595" name="l00595"></a><span class="lineno">  595</span>  }</div>
<div class="line"><a id="l00596" name="l00596"></a><span class="lineno">  596</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00597" name="l00597"></a><span class="lineno">  597</span> </div>
<div class="line"><a id="l00598" name="l00598"></a><span class="lineno">  598</span>  m_snd_ev_wait_func(&amp;m_snd_ev_wait_hndl_auto_ping_timer_fired_peer,</div>
<div class="line"><a id="l00599" name="l00599"></a><span class="lineno">  599</span>                     <span class="keyword">false</span>, <span class="comment">// Wait for read.</span></div>
<div class="line"><a id="l00600" name="l00600"></a><span class="lineno">  600</span>                     boost::make_shared&lt;Task&gt;</div>
<div class="line"><a id="l00601" name="l00601"></a><span class="lineno">  601</span>                       ([<span class="keyword">this</span>]() { snd_on_ev_auto_ping_now_timer_fired(); }));</div>
<div class="line"><a id="l00602" name="l00602"></a><span class="lineno">  602</span>  m_snd_auto_ping_timer.expires_after(m_snd_auto_ping_period);</div>
<div class="line"><a id="l00603" name="l00603"></a><span class="lineno">  603</span>  m_timer_worker.timer_async_wait(&amp;m_snd_auto_ping_timer, m_snd_auto_ping_timer_fired_peer);</div>
<div class="line"><a id="l00604" name="l00604"></a><span class="lineno">  604</span>} <span class="comment">// Native_socket_stream::Impl::snd_on_ev_auto_ping_now_timer_fired()</span></div>
<div class="line"><a id="l00605" name="l00605"></a><span class="lineno">  605</span> </div>
<div class="line"><a id="l00606" name="l00606"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a3c1c949f345f0ceef5eeca3c2edec291">  606</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a3c1c949f345f0ceef5eeca3c2edec291">Native_socket_stream::Impl::snd_sync_write_or_q_payload</a>(<a class="code hl_struct" href="structipc_1_1util_1_1Native__handle.html">Native_handle</a> hndl_or_null,</div>
<div class="line"><a id="l00607" name="l00607"></a><span class="lineno">  607</span>                                                             <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">util::Blob_const</a>&amp; orig_blob, <span class="keywordtype">bool</span> avoid_qing)</div>
<div class="line"><a id="l00608" name="l00608"></a><span class="lineno">  608</span>{</div>
<div class="line"><a id="l00609" name="l00609"></a><span class="lineno">  609</span>  <span class="keyword">using </span>flow::util::Blob;</div>
<div class="line"><a id="l00610" name="l00610"></a><span class="lineno">  610</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">util::Blob_const</a>;</div>
<div class="line"><a id="l00611" name="l00611"></a><span class="lineno">  611</span> </div>
<div class="line"><a id="l00612" name="l00612"></a><span class="lineno">  612</span>  <span class="comment">// We comment liberally, but tactically, inline; but please read the strategy in the class doc header&#39;s impl section.</span></div>
<div class="line"><a id="l00613" name="l00613"></a><span class="lineno">  613</span> </div>
<div class="line"><a id="l00614" name="l00614"></a><span class="lineno">  614</span>  assert((!m_snd_pending_err_code) &amp;&amp; <span class="stringliteral">&quot;Pipe must not be pre-hosed by contract.&quot;</span>);</div>
<div class="line"><a id="l00615" name="l00615"></a><span class="lineno">  615</span> </div>
<div class="line"><a id="l00616" name="l00616"></a><span class="lineno">  616</span>  <span class="keywordtype">size_t</span> n_sent_or_zero;</div>
<div class="line"><a id="l00617" name="l00617"></a><span class="lineno">  617</span>  <span class="keywordflow">if</span> (m_snd_pending_payloads_q.empty())</div>
<div class="line"><a id="l00618" name="l00618"></a><span class="lineno">  618</span>  {</div>
<div class="line"><a id="l00619" name="l00619"></a><span class="lineno">  619</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Want to send low-level payload: &quot;</span></div>
<div class="line"><a id="l00620" name="l00620"></a><span class="lineno">  620</span>                   <span class="stringliteral">&quot;handle [&quot;</span> &lt;&lt; hndl_or_null &lt;&lt; <span class="stringliteral">&quot;] with blob of size [&quot;</span> &lt;&lt; orig_blob.size() &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00621" name="l00621"></a><span class="lineno">  621</span>                   <span class="stringliteral">&quot;located @ [&quot;</span> &lt;&lt; orig_blob.data() &lt;&lt; <span class="stringliteral">&quot;]; no write is pending so proceeding immediately.  &quot;</span></div>
<div class="line"><a id="l00622" name="l00622"></a><span class="lineno">  622</span>                   <span class="stringliteral">&quot;Will drop if all of it would-block? = [&quot;</span> &lt;&lt; avoid_qing &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00623" name="l00623"></a><span class="lineno">  623</span> </div>
<div class="line"><a id="l00624" name="l00624"></a><span class="lineno">  624</span>    n_sent_or_zero = snd_nb_write_low_lvl_payload(hndl_or_null, orig_blob, &amp;m_snd_pending_err_code);</div>
<div class="line"><a id="l00625" name="l00625"></a><span class="lineno">  625</span>    <span class="keywordflow">if</span> (m_snd_pending_err_code) <span class="comment">// It will *not* emit would-block (will just return 0 but no error).</span></div>
<div class="line"><a id="l00626" name="l00626"></a><span class="lineno">  626</span>    {</div>
<div class="line"><a id="l00627" name="l00627"></a><span class="lineno">  627</span>      assert(n_sent_or_zero == 0);</div>
<div class="line"><a id="l00628" name="l00628"></a><span class="lineno">  628</span>      <span class="keywordflow">return</span> <span class="keyword">true</span>; <span class="comment">// Pipe-direction-ending error encountered; outgoing-direction pipe is finished forevermore.</span></div>
<div class="line"><a id="l00629" name="l00629"></a><span class="lineno">  629</span>    }</div>
<div class="line"><a id="l00630" name="l00630"></a><span class="lineno">  630</span>    <span class="comment">// else</span></div>
<div class="line"><a id="l00631" name="l00631"></a><span class="lineno">  631</span> </div>
<div class="line"><a id="l00632" name="l00632"></a><span class="lineno">  632</span>    <span class="keywordflow">if</span> (n_sent_or_zero == orig_blob.size())</div>
<div class="line"><a id="l00633" name="l00633"></a><span class="lineno">  633</span>    {</div>
<div class="line"><a id="l00634" name="l00634"></a><span class="lineno">  634</span>      <span class="comment">// Awesome: Mainstream case: We wrote the whole thing synchronously.</span></div>
<div class="line"><a id="l00635" name="l00635"></a><span class="lineno">  635</span>      <span class="keywordflow">return</span> <span class="keyword">true</span>; <span class="comment">// Outgoing-direction pipe flushed.</span></div>
<div class="line"><a id="l00636" name="l00636"></a><span class="lineno">  636</span>      <span class="comment">// ^-- No error.  Logged about success in snd_nb_write_low_lvl_payload().</span></div>
<div class="line"><a id="l00637" name="l00637"></a><span class="lineno">  637</span>    }</div>
<div class="line"><a id="l00638" name="l00638"></a><span class="lineno">  638</span>    <span class="comment">// else if (n_sent_or_zero &lt; orig_blob.size()) { Fall through.  n_sent_or_zero is significant. }</span></div>
<div class="line"><a id="l00639" name="l00639"></a><span class="lineno">  639</span>  } <span class="comment">// if (m_snd_pending_payloads_q.empty())</span></div>
<div class="line"><a id="l00640" name="l00640"></a><span class="lineno">  640</span>  <span class="keywordflow">else</span> <span class="comment">// if (!m_snd_pending_payloads_q.empty())</span></div>
<div class="line"><a id="l00641" name="l00641"></a><span class="lineno">  641</span>  {</div>
<div class="line"><a id="l00642" name="l00642"></a><span class="lineno">  642</span>    <span class="comment">// Other stuff is currently being asynchronously sent, so we can only queue our payload behind all that.</span></div>
<div class="line"><a id="l00643" name="l00643"></a><span class="lineno">  643</span>    n_sent_or_zero = 0;</div>
<div class="line"><a id="l00644" name="l00644"></a><span class="lineno">  644</span>  }</div>
<div class="line"><a id="l00645" name="l00645"></a><span class="lineno">  645</span> </div>
<div class="line"><a id="l00646" name="l00646"></a><span class="lineno">  646</span>  <span class="comment">/* At this point some or all of the payload could not be sent (either because another async write-op is in progress,</span></div>
<div class="line"><a id="l00647" name="l00647"></a><span class="lineno">  647</span><span class="comment">   * or not but it would-block if we tried to send the rest now).</span></div>
<div class="line"><a id="l00648" name="l00648"></a><span class="lineno">  648</span><span class="comment">   * Per algorithm, we shall now have to queue it up to be sent (and if nothing is currently pending begin</span></div>
<div class="line"><a id="l00649" name="l00649"></a><span class="lineno">  649</span><span class="comment">   * asynchronously sending it ASAP).  The question now is what is &quot;it&quot; exactly: it needs to be exactly the payload</span></div>
<div class="line"><a id="l00650" name="l00650"></a><span class="lineno">  650</span><span class="comment">   * except the parts that *were* just sent (if any).</span></div>
<div class="line"><a id="l00651" name="l00651"></a><span class="lineno">  651</span><span class="comment">   *</span></div>
<div class="line"><a id="l00652" name="l00652"></a><span class="lineno">  652</span><span class="comment">   * avoid_qing==true, as of this writing used for auto-pings only, affects</span></div>
<div class="line"><a id="l00653" name="l00653"></a><span class="lineno">  653</span><span class="comment">   * the above as follows: If *all* of orig_blob would need to be queued (queue was already non-empty, or it</span></div>
<div class="line"><a id="l00654" name="l00654"></a><span class="lineno">  654</span><span class="comment">   * was empty, and snd_nb_write_low_lvl_payload() yielded would-block for *all* of orig_blob.size()), then:</span></div>
<div class="line"><a id="l00655" name="l00655"></a><span class="lineno">  655</span><span class="comment">   * simply pretend like it was sent fine; and continue like nothing happened.  (See our doc header for</span></div>
<div class="line"><a id="l00656" name="l00656"></a><span class="lineno">  656</span><span class="comment">   * rationale.) */</span></div>
<div class="line"><a id="l00657" name="l00657"></a><span class="lineno">  657</span> </div>
<div class="line"><a id="l00658" name="l00658"></a><span class="lineno">  658</span>  <span class="keywordflow">if</span> (avoid_qing)</div>
<div class="line"><a id="l00659" name="l00659"></a><span class="lineno">  659</span>  {</div>
<div class="line"><a id="l00660" name="l00660"></a><span class="lineno">  660</span>    assert(hndl_or_null.<a class="code hl_function" href="structipc_1_1util_1_1Native__handle.html#a11bd62ce0a7bef4bdfe666201c26d4dc">null</a>()</div>
<div class="line"><a id="l00661" name="l00661"></a><span class="lineno">  661</span>           &amp;&amp; <span class="stringliteral">&quot;Internal bug?  Do not ask to drop a payload with a native handle inside under any circumstances.&quot;</span>);</div>
<div class="line"><a id="l00662" name="l00662"></a><span class="lineno">  662</span>    <span class="keywordflow">if</span> (n_sent_or_zero == 0)</div>
<div class="line"><a id="l00663" name="l00663"></a><span class="lineno">  663</span>    {</div>
<div class="line"><a id="l00664" name="l00664"></a><span class="lineno">  664</span>      <span class="comment">/* This would happen at most every few sec (with auto-pings) and is definitely a rather interesting</span></div>
<div class="line"><a id="l00665" name="l00665"></a><span class="lineno">  665</span><span class="comment">       * situation though not an error; INFO is suitable. */</span></div>
<div class="line"><a id="l00666" name="l00666"></a><span class="lineno">  666</span>      <span class="keyword">const</span> <span class="keyword">auto</span> q_size = m_snd_pending_payloads_q.size();</div>
<div class="line"><a id="l00667" name="l00667"></a><span class="lineno">  667</span>      FLOW_LOG_INFO(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Wanted to send low-level payload: &quot;</span></div>
<div class="line"><a id="l00668" name="l00668"></a><span class="lineno">  668</span>                    <span class="stringliteral">&quot;blob of size [&quot;</span> &lt;&lt; orig_blob.size() &lt;&lt; <span class="stringliteral">&quot;] located @ [&quot;</span> &lt;&lt; orig_blob.data() &lt;&lt; <span class="stringliteral">&quot;]; &quot;</span></div>
<div class="line"><a id="l00669" name="l00669"></a><span class="lineno">  669</span>                    <span class="stringliteral">&quot;result was would-block for all of its bytes (either because blocked-queue was non-empty &quot;</span></div>
<div class="line"><a id="l00670" name="l00670"></a><span class="lineno">  670</span>                    <span class="stringliteral">&quot;already, or it was empty, but all of payload&#39;s bytes would-block at this time).  &quot;</span></div>
<div class="line"><a id="l00671" name="l00671"></a><span class="lineno">  671</span>                    <span class="stringliteral">&quot;Therefore dropping payload (done for auto-pings at least).  Out-queue size remains &quot;</span></div>
<div class="line"><a id="l00672" name="l00672"></a><span class="lineno">  672</span>                    <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; q_size &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00673" name="l00673"></a><span class="lineno">  673</span> </div>
<div class="line"><a id="l00674" name="l00674"></a><span class="lineno">  674</span>      <span class="comment">/* We won&#39;t enqueue it, so there&#39;s nothing more to do, but careful in deciding what to return:</span></div>
<div class="line"><a id="l00675" name="l00675"></a><span class="lineno">  675</span><span class="comment">       * If the queue is empty, we promised we would return true.  If the queue is not empty, we promised</span></div>
<div class="line"><a id="l00676" name="l00676"></a><span class="lineno">  676</span><span class="comment">       * we would return false.  Whether that&#39;s what we should do is subtly questionable, but as of this</span></div>
<div class="line"><a id="l00677" name="l00677"></a><span class="lineno">  677</span><span class="comment">       * writing what we return when avoid_qing==true is immaterial (is ignored). */</span></div>
<div class="line"><a id="l00678" name="l00678"></a><span class="lineno">  678</span>      <span class="keywordflow">return</span> q_size == 0;</div>
<div class="line"><a id="l00679" name="l00679"></a><span class="lineno">  679</span>    }</div>
<div class="line"><a id="l00680" name="l00680"></a><span class="lineno">  680</span>    <span class="comment">// else if (n_sent_or_zero &gt; 0) (but not == orig_blob.size())</span></div>
<div class="line"><a id="l00681" name="l00681"></a><span class="lineno">  681</span> </div>
<div class="line"><a id="l00682" name="l00682"></a><span class="lineno">  682</span>    <span class="comment">// This is even more interesting; definitely INFO as well.</span></div>
<div class="line"><a id="l00683" name="l00683"></a><span class="lineno">  683</span>    FLOW_LOG_INFO(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Wanted to send low-level payload: &quot;</span></div>
<div class="line"><a id="l00684" name="l00684"></a><span class="lineno">  684</span>                  <span class="stringliteral">&quot;blob of size [&quot;</span> &lt;&lt; orig_blob.size() &lt;&lt; <span class="stringliteral">&quot;] located @ [&quot;</span> &lt;&lt; orig_blob.data() &lt;&lt; <span class="stringliteral">&quot;]; &quot;</span></div>
<div class="line"><a id="l00685" name="l00685"></a><span class="lineno">  685</span>                  <span class="stringliteral">&quot;result was would-block for all but [&quot;</span> &lt;&lt; n_sent_or_zero &lt;&lt; <span class="stringliteral">&quot;] of its bytes (blocked-queue &quot;</span></div>
<div class="line"><a id="l00686" name="l00686"></a><span class="lineno">  686</span>                  <span class="stringliteral">&quot;was empty, so nb-send was attmpted, and some -- but not all -- of payload&#39;s bytes &quot;</span></div>
<div class="line"><a id="l00687" name="l00687"></a><span class="lineno">  687</span>                  <span class="stringliteral">&quot;would-block at this time).  We cannot \&quot;get back\&quot; the sent bytes and thus are forced &quot;</span></div>
<div class="line"><a id="l00688" name="l00688"></a><span class="lineno">  688</span>                  <span class="stringliteral">&quot;to queue the remaining ones (would have dropped payload if all the bytes would-block).&quot;</span>);</div>
<div class="line"><a id="l00689" name="l00689"></a><span class="lineno">  689</span>    <span class="comment">// Fall-through.</span></div>
<div class="line"><a id="l00690" name="l00690"></a><span class="lineno">  690</span>  } <span class="comment">// if (avoid_qing)</span></div>
<div class="line"><a id="l00691" name="l00691"></a><span class="lineno">  691</span>  <span class="comment">// else if (!avoid_qing) { Fall through. }</span></div>
<div class="line"><a id="l00692" name="l00692"></a><span class="lineno">  692</span> </div>
<div class="line"><a id="l00693" name="l00693"></a><span class="lineno">  693</span>  <span class="keyword">auto</span> new_low_lvl_payload = boost::movelib::make_unique&lt;Snd_low_lvl_payload&gt;();</div>
<div class="line"><a id="l00694" name="l00694"></a><span class="lineno">  694</span>  <span class="keywordflow">if</span> (n_sent_or_zero == 0)</div>
<div class="line"><a id="l00695" name="l00695"></a><span class="lineno">  695</span>  {</div>
<div class="line"><a id="l00696" name="l00696"></a><span class="lineno">  696</span>    new_low_lvl_payload-&gt;m_hndl_or_null = hndl_or_null;</div>
<div class="line"><a id="l00697" name="l00697"></a><span class="lineno">  697</span>  }</div>
<div class="line"><a id="l00698" name="l00698"></a><span class="lineno">  698</span>  <span class="comment">// else { Leave it as null.  Even if (!hndl_or_null.null()): 1+ bytes were sent OK =&gt; so was hndl_or_null. }</span></div>
<div class="line"><a id="l00699" name="l00699"></a><span class="lineno">  699</span> </div>
<div class="line"><a id="l00700" name="l00700"></a><span class="lineno">  700</span>  new_low_lvl_payload-&gt;m_blob = Blob(<a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#aac68d14f4ef33505399df4fd04cd4669">get_logger</a>());</div>
<div class="line"><a id="l00701" name="l00701"></a><span class="lineno">  701</span> </div>
<div class="line"><a id="l00702" name="l00702"></a><span class="lineno">  702</span>  <span class="comment">/* Allocate N bytes; copy N bytes from area referred to by new_blob.  Start at 1st unsent byte (possibly 1st byte).</span></div>
<div class="line"><a id="l00703" name="l00703"></a><span class="lineno">  703</span><span class="comment">   * This is the first and only place we copy the source blob (not counting the transmission into kernel buffer); we</span></div>
<div class="line"><a id="l00704" name="l00704"></a><span class="lineno">  704</span><span class="comment">   * have tried our best to synchronously send all of `new_blob`, which would&#39;ve avoided getting here and this copy.</span></div>
<div class="line"><a id="l00705" name="l00705"></a><span class="lineno">  705</span><span class="comment">   * Now we have no choice.  As discussed in the class doc header, probabilistically speaking we should rarely (if</span></div>
<div class="line"><a id="l00706" name="l00706"></a><span class="lineno">  706</span><span class="comment">   * ever) get here (and do this annoying alloc, and copy, and later dealloc) under normal operation of both sides. */</span></div>
<div class="line"><a id="l00707" name="l00707"></a><span class="lineno">  707</span>  <span class="keyword">const</span> <span class="keyword">auto</span>&amp; new_blob = orig_blob + n_sent_or_zero;</div>
<div class="line"><a id="l00708" name="l00708"></a><span class="lineno">  708</span>  new_low_lvl_payload-&gt;m_blob.assign_copy(new_blob);</div>
<div class="line"><a id="l00709" name="l00709"></a><span class="lineno">  709</span> </div>
<div class="line"><a id="l00710" name="l00710"></a><span class="lineno">  710</span>  FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Want to send pending-from-would-block low-level payload: &quot;</span></div>
<div class="line"><a id="l00711" name="l00711"></a><span class="lineno">  711</span>                 <span class="stringliteral">&quot;handle [&quot;</span> &lt;&lt; new_low_lvl_payload-&gt;m_hndl_or_null &lt;&lt; <span class="stringliteral">&quot;] with &quot;</span></div>
<div class="line"><a id="l00712" name="l00712"></a><span class="lineno">  712</span>                 <span class="stringliteral">&quot;blob of size [&quot;</span> &lt;&lt; new_low_lvl_payload-&gt;m_blob.size() &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00713" name="l00713"></a><span class="lineno">  713</span>                 <span class="stringliteral">&quot;located @ [&quot;</span> &lt;&lt; new_blob.data() &lt;&lt; <span class="stringliteral">&quot;]; &quot;</span></div>
<div class="line"><a id="l00714" name="l00714"></a><span class="lineno">  714</span>                 <span class="stringliteral">&quot;created blob copy @ [&quot;</span> &lt;&lt; new_low_lvl_payload-&gt;m_blob.const_buffer().data() &lt;&lt; <span class="stringliteral">&quot;]; &quot;</span></div>
<div class="line"><a id="l00715" name="l00715"></a><span class="lineno">  715</span>                 <span class="stringliteral">&quot;enqueued to out-queue which is now of size [&quot;</span> &lt;&lt; (m_snd_pending_payloads_q.size() + 1) &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00716" name="l00716"></a><span class="lineno">  716</span> </div>
<div class="line"><a id="l00717" name="l00717"></a><span class="lineno">  717</span>  m_snd_pending_payloads_q.emplace(std::move(new_low_lvl_payload)); <span class="comment">// Push a new Snd_low_lvl_payload::Ptr.</span></div>
<div class="line"><a id="l00718" name="l00718"></a><span class="lineno">  718</span> </div>
<div class="line"><a id="l00719" name="l00719"></a><span class="lineno">  719</span>  <span class="keywordflow">if</span> (m_snd_pending_payloads_q.size() == 1)</div>
<div class="line"><a id="l00720" name="l00720"></a><span class="lineno">  720</span>  {</div>
<div class="line"><a id="l00721" name="l00721"></a><span class="lineno">  721</span>    <span class="comment">/* Queue was empty; now it isn&#39;t; so start the chain of async send head=&gt;dequeue=&gt;async send head=&gt;dequeue=&gt;....</span></div>
<div class="line"><a id="l00722" name="l00722"></a><span class="lineno">  722</span><span class="comment">     * (In our case &quot;async send head&quot; means asking (via m_snd_ev_wait_func) user to inform (via callback we pass</span></div>
<div class="line"><a id="l00723" name="l00723"></a><span class="lineno">  723</span><span class="comment">     * to m_snd_ev_wait_func) us when would-block has cleared, call snd_nb_write_low_lvl_payload() again....</span></div>
<div class="line"><a id="l00724" name="l00724"></a><span class="lineno">  724</span><span class="comment">     * If we were operating directly as a boost.asio async loop then the first part would just be</span></div>
<div class="line"><a id="l00725" name="l00725"></a><span class="lineno">  725</span><span class="comment">     * m_peer_socket-&gt;async_wait(); but we cannot do that; user does it for us, controlling what gets called when</span></div>
<div class="line"><a id="l00726" name="l00726"></a><span class="lineno">  726</span><span class="comment">     * synchronously.) */</span></div>
<div class="line"><a id="l00727" name="l00727"></a><span class="lineno">  727</span>    snd_async_write_q_head_payload();</div>
<div class="line"><a id="l00728" name="l00728"></a><span class="lineno">  728</span> </div>
<div class="line"><a id="l00729" name="l00729"></a><span class="lineno">  729</span>    <span class="comment">/* That immediately failed =&gt; m_snd_pending_err_code is truthy</span></div>
<div class="line"><a id="l00730" name="l00730"></a><span class="lineno">  730</span><span class="comment">     *   =&gt; Pipe-direction-ending error encountered; outgoing-direction pipe is finished forevermore. =&gt; return true;</span></div>
<div class="line"><a id="l00731" name="l00731"></a><span class="lineno">  731</span><span class="comment">     * That did not fail (&quot;async&quot;-wait for writable begins) =&gt; m_snd_pending_err_code is falsy</span></div>
<div class="line"><a id="l00732" name="l00732"></a><span class="lineno">  732</span><span class="comment">     *   =&gt; Outgoing-direction pipe has pending queued stuff. =&gt; return false; */</span></div>
<div class="line"><a id="l00733" name="l00733"></a><span class="lineno">  733</span>    <span class="keywordflow">return</span> bool(m_snd_pending_err_code);</div>
<div class="line"><a id="l00734" name="l00734"></a><span class="lineno">  734</span>  }</div>
<div class="line"><a id="l00735" name="l00735"></a><span class="lineno">  735</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00736" name="l00736"></a><span class="lineno">  736</span>  assert(!m_snd_pending_err_code);</div>
<div class="line"><a id="l00737" name="l00737"></a><span class="lineno">  737</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>; <span class="comment">// Outgoing-direction pipe has (even more) pending queued stuff; nothing to do about it for now.</span></div>
<div class="line"><a id="l00738" name="l00738"></a><span class="lineno">  738</span>} <span class="comment">// Native_socket_stream::Impl::snd_sync_write_or_q_payload()</span></div>
<div class="line"><a id="l00739" name="l00739"></a><span class="lineno">  739</span> </div>
<div class="line"><a id="l00740" name="l00740"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#af321a9b3ed8dc21f23988bf79c7c33f0">  740</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#af321a9b3ed8dc21f23988bf79c7c33f0">Native_socket_stream::Impl::snd_nb_write_low_lvl_payload</a>(<a class="code hl_struct" href="structipc_1_1util_1_1Native__handle.html">Native_handle</a> hndl_or_null,</div>
<div class="line"><a id="l00741" name="l00741"></a><span class="lineno">  741</span>                                                                <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">util::Blob_const</a>&amp; blob, <a class="code hl_typedef" href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">Error_code</a>* err_code)</div>
<div class="line"><a id="l00742" name="l00742"></a><span class="lineno">  742</span>{</div>
<div class="line"><a id="l00743" name="l00743"></a><span class="lineno">  743</span>  <span class="keyword">using </span>flow::util::Lock_guard;</div>
<div class="line"><a id="l00744" name="l00744"></a><span class="lineno">  744</span>  <span class="keyword">using </span><a class="code hl_function" href="namespaceipc_1_1transport_1_1asio__local__stream__socket.html#a1022dfd42e9a0d6eab8384b0352decb0">asio_local_stream_socket::nb_write_some_with_native_handle</a>;</div>
<div class="line"><a id="l00745" name="l00745"></a><span class="lineno">  745</span> </div>
<div class="line"><a id="l00746" name="l00746"></a><span class="lineno">  746</span>  <span class="comment">// We comment liberally, but tactically, inline; but please read the strategy in the class doc header&#39;s impl section.</span></div>
<div class="line"><a id="l00747" name="l00747"></a><span class="lineno">  747</span> </div>
<div class="line"><a id="l00748" name="l00748"></a><span class="lineno">  748</span>  <span class="comment">/* Result semantics (reminder of what we promised in contract):</span></div>
<div class="line"><a id="l00749" name="l00749"></a><span class="lineno">  749</span><span class="comment">   *   Partial or total success in non-blockingly sending blob+handle: &gt;= 1; falsy *err_code.</span></div>
<div class="line"><a id="l00750" name="l00750"></a><span class="lineno">  750</span><span class="comment">   *   No success in sending blob+handle, because it would-block (not fatal): == 0; falsy *err_code.</span></div>
<div class="line"><a id="l00751" name="l00751"></a><span class="lineno">  751</span><span class="comment">   *   No success in sending blob+handle, because fatal error: == 0, truthy *err_code. */</span></div>
<div class="line"><a id="l00752" name="l00752"></a><span class="lineno">  752</span>  <span class="keywordtype">size_t</span> n_sent_or_zero = 0;</div>
<div class="line"><a id="l00753" name="l00753"></a><span class="lineno">  753</span> </div>
<div class="line"><a id="l00754" name="l00754"></a><span class="lineno">  754</span>  <span class="comment">// m_*peer_socket = (the only) shared data between our- and opposite-direction code.  Must lock (see class docs).</span></div>
<div class="line"><a id="l00755" name="l00755"></a><span class="lineno">  755</span>  {</div>
<div class="line"><a id="l00756" name="l00756"></a><span class="lineno">  756</span>    Lock_guard&lt;<span class="keyword">decltype</span>(m_peer_socket_mutex)&gt; peer_socket_lock(m_peer_socket_mutex);</div>
<div class="line"><a id="l00757" name="l00757"></a><span class="lineno">  757</span> </div>
<div class="line"><a id="l00758" name="l00758"></a><span class="lineno">  758</span>    <span class="keywordflow">if</span> (m_peer_socket)</div>
<div class="line"><a id="l00759" name="l00759"></a><span class="lineno">  759</span>    {</div>
<div class="line"><a id="l00760" name="l00760"></a><span class="lineno">  760</span>      <span class="keywordflow">if</span> (hndl_or_null.<a class="code hl_function" href="structipc_1_1util_1_1Native__handle.html#a11bd62ce0a7bef4bdfe666201c26d4dc">null</a>())</div>
<div class="line"><a id="l00761" name="l00761"></a><span class="lineno">  761</span>      {</div>
<div class="line"><a id="l00762" name="l00762"></a><span class="lineno">  762</span>        <span class="comment">/* hndl_or_null is in fact null, so we can just use boost.asio&#39;s normal non-blocking send (non_blocking(true),</span></div>
<div class="line"><a id="l00763" name="l00763"></a><span class="lineno">  763</span><span class="comment">         * write_some()). */</span></div>
<div class="line"><a id="l00764" name="l00764"></a><span class="lineno">  764</span> </div>
<div class="line"><a id="l00765" name="l00765"></a><span class="lineno">  765</span>        <span class="comment">/* First set non-blocking mode.  (Subtlety: We could use Linux extension per-call MSG_DONTWAIT flag instead;</span></div>
<div class="line"><a id="l00766" name="l00766"></a><span class="lineno">  766</span><span class="comment">         * but this way is fully portable.  For posterity: to do that, use m_peer_socket-&gt;send(), which is identical to</span></div>
<div class="line"><a id="l00767" name="l00767"></a><span class="lineno">  767</span><span class="comment">         * write_some() but has an overload accepting flags to OS send() call, where one could supply MSG_DONTWAIT.</span></div>
<div class="line"><a id="l00768" name="l00768"></a><span class="lineno">  768</span><span class="comment">         * boost.asio lacks a constant for it, but we could just use actual MSG_DONTWAIT; of course stylistically that&#39;s</span></div>
<div class="line"><a id="l00769" name="l00769"></a><span class="lineno">  769</span><span class="comment">         * not as nice and suggests lesser portability.) */</span></div>
<div class="line"><a id="l00770" name="l00770"></a><span class="lineno">  770</span>        <span class="keywordflow">if</span> (!m_peer_socket-&gt;non_blocking()) <span class="comment">// This is fast (it doesn&#39;t run system calls but uses a cached value).</span></div>
<div class="line"><a id="l00771" name="l00771"></a><span class="lineno">  771</span>        {</div>
<div class="line"><a id="l00772" name="l00772"></a><span class="lineno">  772</span>          FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Setting boost.asio peer socket non-blocking mode.&quot;</span>);</div>
<div class="line"><a id="l00773" name="l00773"></a><span class="lineno">  773</span>          m_peer_socket-&gt;non_blocking(<span class="keyword">true</span>, *err_code); <span class="comment">// Sets *err_code to success or the triggering error.</span></div>
<div class="line"><a id="l00774" name="l00774"></a><span class="lineno">  774</span>        }</div>
<div class="line"><a id="l00775" name="l00775"></a><span class="lineno">  775</span>        <span class="keywordflow">else</span> <span class="comment">// if (already non-blocking)</span></div>
<div class="line"><a id="l00776" name="l00776"></a><span class="lineno">  776</span>        {</div>
<div class="line"><a id="l00777" name="l00777"></a><span class="lineno">  777</span>          err_code-&gt;clear();</div>
<div class="line"><a id="l00778" name="l00778"></a><span class="lineno">  778</span>        }</div>
<div class="line"><a id="l00779" name="l00779"></a><span class="lineno">  779</span> </div>
<div class="line"><a id="l00780" name="l00780"></a><span class="lineno">  780</span>        <span class="keywordflow">if</span> (!*err_code)</div>
<div class="line"><a id="l00781" name="l00781"></a><span class="lineno">  781</span>        {</div>
<div class="line"><a id="l00782" name="l00782"></a><span class="lineno">  782</span>          assert(m_peer_socket-&gt;non_blocking());</div>
<div class="line"><a id="l00783" name="l00783"></a><span class="lineno">  783</span> </div>
<div class="line"><a id="l00784" name="l00784"></a><span class="lineno">  784</span>          FLOW_LOG_TRACE(<span class="stringliteral">&quot;Writing low-level blob directly via boost.asio (blob details logged above hopefully).&quot;</span>);</div>
<div class="line"><a id="l00785" name="l00785"></a><span class="lineno">  785</span> </div>
<div class="line"><a id="l00786" name="l00786"></a><span class="lineno">  786</span>          n_sent_or_zero = m_peer_socket-&gt;write_some(blob, *err_code);</div>
<div class="line"><a id="l00787" name="l00787"></a><span class="lineno">  787</span>        }</div>
<div class="line"><a id="l00788" name="l00788"></a><span class="lineno">  788</span>        <span class="comment">// else if (*err_code) { *err_code is truthy; n_sent_or_zero == 0; cool. }</span></div>
<div class="line"><a id="l00789" name="l00789"></a><span class="lineno">  789</span>      } <span class="comment">// if (hndl_or_null.null())</span></div>
<div class="line"><a id="l00790" name="l00790"></a><span class="lineno">  790</span>      <span class="keywordflow">else</span> <span class="comment">// if (!hndl_or_null.null())</span></div>
<div class="line"><a id="l00791" name="l00791"></a><span class="lineno">  791</span>      {</div>
<div class="line"><a id="l00792" name="l00792"></a><span class="lineno">  792</span>        <span class="comment">/* Per contract, nb_write_some_with_native_handle() is identical to setting non_blocking(true) and attempting</span></div>
<div class="line"><a id="l00793" name="l00793"></a><span class="lineno">  793</span><span class="comment">         * write_some(orig_blob) -- except if it&#39;s able to send even 1 byte it&#39;ll also have sent through hndl_or_null.</span></div>
<div class="line"><a id="l00794" name="l00794"></a><span class="lineno">  794</span><span class="comment">         * When we say identical we mean identical result semantics along with everything else. */</span></div>
<div class="line"><a id="l00795" name="l00795"></a><span class="lineno">  795</span>        n_sent_or_zero = <a class="code hl_function" href="namespaceipc_1_1transport_1_1asio__local__stream__socket.html#a1022dfd42e9a0d6eab8384b0352decb0">nb_write_some_with_native_handle</a>(<a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#aac68d14f4ef33505399df4fd04cd4669">get_logger</a>(), m_peer_socket.get(),</div>
<div class="line"><a id="l00796" name="l00796"></a><span class="lineno">  796</span>                                                          hndl_or_null, blob, err_code);</div>
<div class="line"><a id="l00797" name="l00797"></a><span class="lineno">  797</span>        <span class="comment">// That should have TRACE-logged stuff, so we won&#39;t (it&#39;s our function).</span></div>
<div class="line"><a id="l00798" name="l00798"></a><span class="lineno">  798</span>      }</div>
<div class="line"><a id="l00799" name="l00799"></a><span class="lineno">  799</span> </div>
<div class="line"><a id="l00800" name="l00800"></a><span class="lineno">  800</span>      <span class="comment">/* Almost home free; but our result semantics are a little different from the low-level-write functions&#39;.</span></div>
<div class="line"><a id="l00801" name="l00801"></a><span class="lineno">  801</span><span class="comment">       *</span></div>
<div class="line"><a id="l00802" name="l00802"></a><span class="lineno">  802</span><span class="comment">       * Plus, if we just discovered the connection is hosed, do whatever&#39;s needed with that. */</span></div>
<div class="line"><a id="l00803" name="l00803"></a><span class="lineno">  803</span>      assert(((!*err_code) &amp;&amp; (n_sent_or_zero != 0))</div>
<div class="line"><a id="l00804" name="l00804"></a><span class="lineno">  804</span>             || (*err_code &amp;&amp; (n_sent_or_zero == 0)));</div>
<div class="line"><a id="l00805" name="l00805"></a><span class="lineno">  805</span>      <span class="keywordflow">if</span> (*err_code == boost::asio::error::would_block)</div>
<div class="line"><a id="l00806" name="l00806"></a><span class="lineno">  806</span>      {</div>
<div class="line"><a id="l00807" name="l00807"></a><span class="lineno">  807</span>        err_code-&gt;clear();</div>
<div class="line"><a id="l00808" name="l00808"></a><span class="lineno">  808</span>        <span class="comment">// *err_code is falsy; n_sent_or_zero == 0; cool.</span></div>
<div class="line"><a id="l00809" name="l00809"></a><span class="lineno">  809</span>      }</div>
<div class="line"><a id="l00810" name="l00810"></a><span class="lineno">  810</span>      <span class="keywordflow">else</span> <span class="keywordflow">if</span> (*err_code)</div>
<div class="line"><a id="l00811" name="l00811"></a><span class="lineno">  811</span>      {</div>
<div class="line"><a id="l00812" name="l00812"></a><span class="lineno">  812</span>        <span class="comment">// True-blue system error.  Kill off *m_peer_socket: might as well give it back to the system (it&#39;s a resource).</span></div>
<div class="line"><a id="l00813" name="l00813"></a><span class="lineno">  813</span> </div>
<div class="line"><a id="l00814" name="l00814"></a><span class="lineno">  814</span>        <span class="comment">// Closes peer socket to the (hosed anyway) connection; including ::close(m_peer_socket-&gt;native_handle()).</span></div>
<div class="line"><a id="l00815" name="l00815"></a><span class="lineno">  815</span>        m_peer_socket.reset();</div>
<div class="line"><a id="l00816" name="l00816"></a><span class="lineno">  816</span> </div>
<div class="line"><a id="l00817" name="l00817"></a><span class="lineno">  817</span>        <span class="comment">// *err_code is truthy; n_sent_or_zero == 0; cool.</span></div>
<div class="line"><a id="l00818" name="l00818"></a><span class="lineno">  818</span>      }</div>
<div class="line"><a id="l00819" name="l00819"></a><span class="lineno">  819</span>      <span class="comment">// else if (!*err_code) { *err_code is falsy; n_sent_or_zero &gt;= 1; cool. }</span></div>
<div class="line"><a id="l00820" name="l00820"></a><span class="lineno">  820</span>    } <span class="comment">// if (m_peer_socket)</span></div>
<div class="line"><a id="l00821" name="l00821"></a><span class="lineno">  821</span>    <span class="keywordflow">else</span> <span class="comment">// if (!m_peer_socket)</span></div>
<div class="line"><a id="l00822" name="l00822"></a><span class="lineno">  822</span>    {</div>
<div class="line"><a id="l00823" name="l00823"></a><span class="lineno">  823</span>      *err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297adc5d7b9dbaa8c76c6835e3c9a7942410">error::Code::S_LOW_LVL_TRANSPORT_HOSED_CANNOT_SEND</a>;</div>
<div class="line"><a id="l00824" name="l00824"></a><span class="lineno">  824</span>    }</div>
<div class="line"><a id="l00825" name="l00825"></a><span class="lineno">  825</span>  } <span class="comment">// Lock_guard peer_socket_lock(m_peer_socket_mutex)</span></div>
<div class="line"><a id="l00826" name="l00826"></a><span class="lineno">  826</span> </div>
<div class="line"><a id="l00827" name="l00827"></a><span class="lineno">  827</span>  assert((!*err_code)</div>
<div class="line"><a id="l00828" name="l00828"></a><span class="lineno">  828</span>         || (n_sent_or_zero == 0)); <span class="comment">// &amp;&amp; *err_code</span></div>
<div class="line"><a id="l00829" name="l00829"></a><span class="lineno">  829</span> </div>
<div class="line"><a id="l00830" name="l00830"></a><span class="lineno">  830</span>  <span class="keywordflow">if</span> (*err_code)</div>
<div class="line"><a id="l00831" name="l00831"></a><span class="lineno">  831</span>  {</div>
<div class="line"><a id="l00832" name="l00832"></a><span class="lineno">  832</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Sent nothing due to error [&quot;</span> &lt;&lt; *err_code &lt;&lt; <span class="stringliteral">&quot;] [&quot;</span> &lt;&lt; err_code-&gt;message() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00833" name="l00833"></a><span class="lineno">  833</span>  }</div>
<div class="line"><a id="l00834" name="l00834"></a><span class="lineno">  834</span>  <span class="keywordflow">else</span></div>
<div class="line"><a id="l00835" name="l00835"></a><span class="lineno">  835</span>  {</div>
<div class="line"><a id="l00836" name="l00836"></a><span class="lineno">  836</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Send: no error.  Was able to send [&quot;</span> &lt;&lt; n_sent_or_zero &lt;&lt; <span class="stringliteral">&quot;] of [&quot;</span> &lt;&lt; blob.size() &lt;&lt; <span class="stringliteral">&quot;] bytes.&quot;</span>);</div>
<div class="line"><a id="l00837" name="l00837"></a><span class="lineno">  837</span>    <span class="keywordflow">if</span> (!hndl_or_null.<a class="code hl_function" href="structipc_1_1util_1_1Native__handle.html#a11bd62ce0a7bef4bdfe666201c26d4dc">null</a>())</div>
<div class="line"><a id="l00838" name="l00838"></a><span class="lineno">  838</span>    {</div>
<div class="line"><a id="l00839" name="l00839"></a><span class="lineno">  839</span>      FLOW_LOG_TRACE(<span class="stringliteral">&quot;Able to send the native handle? = [&quot;</span> &lt;&lt; (n_sent_or_zero != 0) &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00840" name="l00840"></a><span class="lineno">  840</span>    }</div>
<div class="line"><a id="l00841" name="l00841"></a><span class="lineno">  841</span>  }</div>
<div class="line"><a id="l00842" name="l00842"></a><span class="lineno">  842</span> </div>
<div class="line"><a id="l00843" name="l00843"></a><span class="lineno">  843</span>  <span class="keywordflow">return</span> n_sent_or_zero;</div>
<div class="line"><a id="l00844" name="l00844"></a><span class="lineno">  844</span>} <span class="comment">// Native_socket_stream::Impl::snd_nb_write_low_lvl_payload()</span></div>
<div class="line"><a id="l00845" name="l00845"></a><span class="lineno">  845</span> </div>
<div class="line"><a id="l00846" name="l00846"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a5e9ed53ef25f4413c8da315f8dbcff2c">  846</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a5e9ed53ef25f4413c8da315f8dbcff2c">Native_socket_stream::Impl::snd_async_write_q_head_payload</a>()</div>
<div class="line"><a id="l00847" name="l00847"></a><span class="lineno">  847</span>{</div>
<div class="line"><a id="l00848" name="l00848"></a><span class="lineno">  848</span>  <span class="keyword">using </span><a class="code hl_function" href="namespaceipc_1_1transport_1_1asio__local__stream__socket.html#a68071e53f4a048084f8ad26ff3ac6711">asio_local_stream_socket::async_write_with_native_handle</a>;</div>
<div class="line"><a id="l00849" name="l00849"></a><span class="lineno">  849</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceipc_1_1util.html#a31e67d3a017477a04b313927e2f2c733">util::Task</a>;</div>
<div class="line"><a id="l00850" name="l00850"></a><span class="lineno">  850</span>  <span class="keyword">using </span>flow::util::Lock_guard;</div>
<div class="line"><a id="l00851" name="l00851"></a><span class="lineno">  851</span>  <span class="keyword">using </span>boost::asio::async_write;</div>
<div class="line"><a id="l00852" name="l00852"></a><span class="lineno">  852</span> </div>
<div class="line"><a id="l00853" name="l00853"></a><span class="lineno">  853</span>  <span class="comment">// We comment liberally, but tactically, inline; but please read the strategy in the class doc header&#39;s impl section.</span></div>
<div class="line"><a id="l00854" name="l00854"></a><span class="lineno">  854</span> </div>
<div class="line"><a id="l00855" name="l00855"></a><span class="lineno">  855</span>  assert((!m_snd_pending_payloads_q.empty()) &amp;&amp; <span class="stringliteral">&quot;Contract is stuff is queued to be async-sent.  Bug?&quot;</span>);</div>
<div class="line"><a id="l00856" name="l00856"></a><span class="lineno">  856</span>  assert((!m_snd_pending_err_code) &amp;&amp; <span class="stringliteral">&quot;Pipe must not be pre-hosed by contract.&quot;</span>);</div>
<div class="line"><a id="l00857" name="l00857"></a><span class="lineno">  857</span> </div>
<div class="line"><a id="l00858" name="l00858"></a><span class="lineno">  858</span>  <span class="comment">/* Conceptually we&#39;d like to do m_peer_socket-&gt;async_wait(writable, F), where F() would perform</span></div>
<div class="line"><a id="l00859" name="l00859"></a><span class="lineno">  859</span><span class="comment">   * snd_nb_write_low_lvl_payload() (nb-send over m_peer_socket).  However this is the sync_io pattern, so</span></div>
<div class="line"><a id="l00860" name="l00860"></a><span class="lineno">  860</span><span class="comment">   * the user will be performing the conceptual async_wait() for us.  We must ask them to do so</span></div>
<div class="line"><a id="l00861" name="l00861"></a><span class="lineno">  861</span><span class="comment">   * via m_snd_ev_wait_func(), giving them m_peer_socket&#39;s FD -- m_snd_ev_wait_hndl_peer_socket -- to wait-on. */</span></div>
<div class="line"><a id="l00862" name="l00862"></a><span class="lineno">  862</span> </div>
<div class="line"><a id="l00863" name="l00863"></a><span class="lineno">  863</span>  <span class="comment">// m_*peer_socket = (the only) shared data between our- and opposite-direction code.  Must lock (see class docs).</span></div>
<div class="line"><a id="l00864" name="l00864"></a><span class="lineno">  864</span>  {</div>
<div class="line"><a id="l00865" name="l00865"></a><span class="lineno">  865</span>    Lock_guard&lt;<span class="keyword">decltype</span>(m_peer_socket_mutex)&gt; peer_socket_lock(m_peer_socket_mutex);</div>
<div class="line"><a id="l00866" name="l00866"></a><span class="lineno">  866</span> </div>
<div class="line"><a id="l00867" name="l00867"></a><span class="lineno">  867</span>    <span class="keywordflow">if</span> (m_peer_socket)</div>
<div class="line"><a id="l00868" name="l00868"></a><span class="lineno">  868</span>    {</div>
<div class="line"><a id="l00869" name="l00869"></a><span class="lineno">  869</span>      <span class="comment">/* @todo Previously, when we ran our own boost.asio loop in a separate thread mandatorily (non-sync_io pattern),</span></div>
<div class="line"><a id="l00870" name="l00870"></a><span class="lineno">  870</span><span class="comment">       * we did either boost::asio::async_write() (stubborn write, no handle to send) or</span></div>
<div class="line"><a id="l00871" name="l00871"></a><span class="lineno">  871</span><span class="comment">       * asio_local_stream_socket::async_write_with_native_handle (same but with handle to send).</span></div>
<div class="line"><a id="l00872" name="l00872"></a><span class="lineno">  872</span><span class="comment">       * Either one would do the async_wait()-&gt;nb-write-&gt;async_wait()-&gt;... chain for us.  Now with sync_io we</span></div>
<div class="line"><a id="l00873" name="l00873"></a><span class="lineno">  873</span><span class="comment">       * manually split it up into our version of &quot;async&quot;-wait-&gt;nb-write-&gt;....  However other than the</span></div>
<div class="line"><a id="l00874" name="l00874"></a><span class="lineno">  874</span><span class="comment">       * &quot;async-wait&quot; mechanism itself, the logic is the same.  The to-do would be to perhaps provide</span></div>
<div class="line"><a id="l00875" name="l00875"></a><span class="lineno">  875</span><span class="comment">       * those functions in such a way as to work with the sync_io way of &quot;async&quot;-waiting, without getting rid</span></div>
<div class="line"><a id="l00876" name="l00876"></a><span class="lineno">  876</span><span class="comment">       * of the publicly useful non-sync_io API (some layered design, confined to</span></div>
<div class="line"><a id="l00877" name="l00877"></a><span class="lineno">  877</span><span class="comment">       * asio_local_stream_socket::*).  The logic would not need to be repeated and maintained in two places;</span></div>
<div class="line"><a id="l00878" name="l00878"></a><span class="lineno">  878</span><span class="comment">       * as of this writing the non-sync_io version has become for direct public use (by user) only anyway;</span></div>
<div class="line"><a id="l00879" name="l00879"></a><span class="lineno">  879</span><span class="comment">       * two birds one stone to have both use cases use the same core logic code. */</span></div>
<div class="line"><a id="l00880" name="l00880"></a><span class="lineno">  880</span> </div>
<div class="line"><a id="l00881" name="l00881"></a><span class="lineno">  881</span>      m_snd_ev_wait_func(&amp;m_ev_wait_hndl_peer_socket,</div>
<div class="line"><a id="l00882" name="l00882"></a><span class="lineno">  882</span>                         <span class="keyword">true</span>, <span class="comment">// Wait for write.</span></div>
<div class="line"><a id="l00883" name="l00883"></a><span class="lineno">  883</span>                         <span class="comment">// Once writable do this:</span></div>
<div class="line"><a id="l00884" name="l00884"></a><span class="lineno">  884</span>                         boost::make_shared&lt;Task&gt;</div>
<div class="line"><a id="l00885" name="l00885"></a><span class="lineno">  885</span>                           ([<span class="keyword">this</span>]() { snd_on_ev_peer_socket_writable_or_error(); }));</div>
<div class="line"><a id="l00886" name="l00886"></a><span class="lineno">  886</span>      <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00887" name="l00887"></a><span class="lineno">  887</span>    }</div>
<div class="line"><a id="l00888" name="l00888"></a><span class="lineno">  888</span>    <span class="comment">// else:</span></div>
<div class="line"><a id="l00889" name="l00889"></a><span class="lineno">  889</span>  } <span class="comment">// Lock_guard peer_socket_lock(m_peer_socket_mutex)</span></div>
<div class="line"><a id="l00890" name="l00890"></a><span class="lineno">  890</span> </div>
<div class="line"><a id="l00891" name="l00891"></a><span class="lineno">  891</span>  m_snd_pending_err_code = <a class="code hl_enumvalue" href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297adc5d7b9dbaa8c76c6835e3c9a7942410">error::Code::S_LOW_LVL_TRANSPORT_HOSED_CANNOT_SEND</a>;</div>
<div class="line"><a id="l00892" name="l00892"></a><span class="lineno">  892</span> </div>
<div class="line"><a id="l00893" name="l00893"></a><span class="lineno">  893</span>  <span class="comment">/* Style note: I (ygoldfel) was tempted to make snd_on_ev_peer_socket_writable_or_error() a closure right in here,</span></div>
<div class="line"><a id="l00894" name="l00894"></a><span class="lineno">  894</span><span class="comment">   * which saves boiler-plate lines, but subjectively the reading flow seemed too gnarly here.  Typically I would have</span></div>
<div class="line"><a id="l00895" name="l00895"></a><span class="lineno">  895</span><span class="comment">   * done it that other way though; in fact originally that&#39;s how I had it, but it proved too gnarly over time.</span></div>
<div class="line"><a id="l00896" name="l00896"></a><span class="lineno">  896</span><span class="comment">   * Among other things it&#39;s nice to have the on-sent handler appear right *below* the async-op that takes it as</span></div>
<div class="line"><a id="l00897" name="l00897"></a><span class="lineno">  897</span><span class="comment">   * an arg; *above* is dicey to read. */</span></div>
<div class="line"><a id="l00898" name="l00898"></a><span class="lineno">  898</span>} <span class="comment">// Native_socket_stream::Impl::snd_async_write_q_head_payload()</span></div>
<div class="line"><a id="l00899" name="l00899"></a><span class="lineno">  899</span> </div>
<div class="line"><a id="l00900" name="l00900"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a2c2b11477fb5089af7608c45dec939c0">  900</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a2c2b11477fb5089af7608c45dec939c0">Native_socket_stream::Impl::snd_on_ev_peer_socket_writable_or_error</a>()</div>
<div class="line"><a id="l00901" name="l00901"></a><span class="lineno">  901</span>{</div>
<div class="line"><a id="l00902" name="l00902"></a><span class="lineno">  902</span>  FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User-performed wait-for-writable finished (writable or error, &quot;</span></div>
<div class="line"><a id="l00903" name="l00903"></a><span class="lineno">  903</span>                 <span class="stringliteral">&quot;we do not know which yet).  We endeavour to send-&gt;pop-&gt;send-&gt;... as much of the queue as we &quot;</span></div>
<div class="line"><a id="l00904" name="l00904"></a><span class="lineno">  904</span>                 <span class="stringliteral">&quot;can until would-block or total success.&quot;</span>);</div>
<div class="line"><a id="l00905" name="l00905"></a><span class="lineno">  905</span> </div>
<div class="line"><a id="l00906" name="l00906"></a><span class="lineno">  906</span>  assert((!m_snd_pending_payloads_q.empty()) &amp;&amp; <span class="stringliteral">&quot;Send-queue should not be touched while async-write of head is going.&quot;</span>);</div>
<div class="line"><a id="l00907" name="l00907"></a><span class="lineno">  907</span>  assert((!m_snd_pending_err_code) &amp;&amp; <span class="stringliteral">&quot;Send error would only be detected by us.  Bug?&quot;</span>);</div>
<div class="line"><a id="l00908" name="l00908"></a><span class="lineno">  908</span> </div>
<div class="line"><a id="l00909" name="l00909"></a><span class="lineno">  909</span>  <span class="comment">// Let&#39;s do as much as we can.</span></div>
<div class="line"><a id="l00910" name="l00910"></a><span class="lineno">  910</span>  <span class="keywordtype">bool</span> would_block = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00911" name="l00911"></a><span class="lineno">  911</span>  <span class="keywordflow">do</span></div>
<div class="line"><a id="l00912" name="l00912"></a><span class="lineno">  912</span>  {</div>
<div class="line"><a id="l00913" name="l00913"></a><span class="lineno">  913</span>    <span class="keyword">auto</span>&amp; low_lvl_payload = *m_snd_pending_payloads_q.front();</div>
<div class="line"><a id="l00914" name="l00914"></a><span class="lineno">  914</span>    <span class="keyword">auto</span>&amp; hndl_or_null = low_lvl_payload.m_hndl_or_null;</div>
<div class="line"><a id="l00915" name="l00915"></a><span class="lineno">  915</span>    <span class="keyword">auto</span>&amp; low_lvl_blob = low_lvl_payload.m_blob;</div>
<div class="line"><a id="l00916" name="l00916"></a><span class="lineno">  916</span>    <span class="keyword">auto</span> low_lvl_blob_view = low_lvl_blob.const_buffer();</div>
<div class="line"><a id="l00917" name="l00917"></a><span class="lineno">  917</span> </div>
<div class="line"><a id="l00918" name="l00918"></a><span class="lineno">  918</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00919" name="l00919"></a><span class="lineno">  919</span>                   <span class="stringliteral">&quot;Out-queue size is [&quot;</span> &lt;&lt; m_snd_pending_payloads_q.size() &lt;&lt; <span class="stringliteral">&quot;]; &quot;</span></div>
<div class="line"><a id="l00920" name="l00920"></a><span class="lineno">  920</span>                   <span class="stringliteral">&quot;want to send handle [&quot;</span> &lt;&lt; hndl_or_null &lt;&lt; <span class="stringliteral">&quot;] with &quot;</span></div>
<div class="line"><a id="l00921" name="l00921"></a><span class="lineno">  921</span>                   <span class="stringliteral">&quot;low-level blob of size [&quot;</span> &lt;&lt; low_lvl_blob_view.size() &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00922" name="l00922"></a><span class="lineno">  922</span>                   <span class="stringliteral">&quot;located @ [&quot;</span> &lt;&lt; low_lvl_blob_view.data() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00923" name="l00923"></a><span class="lineno">  923</span> </div>
<div class="line"><a id="l00924" name="l00924"></a><span class="lineno">  924</span>    <span class="keyword">const</span> <span class="keyword">auto</span> n_sent_or_zero</div>
<div class="line"><a id="l00925" name="l00925"></a><span class="lineno">  925</span>      = snd_nb_write_low_lvl_payload(low_lvl_payload.m_hndl_or_null, low_lvl_blob_view, &amp;m_snd_pending_err_code);</div>
<div class="line"><a id="l00926" name="l00926"></a><span class="lineno">  926</span>    <span class="keywordflow">if</span> (m_snd_pending_err_code)</div>
<div class="line"><a id="l00927" name="l00927"></a><span class="lineno">  927</span>    {</div>
<div class="line"><a id="l00928" name="l00928"></a><span class="lineno">  928</span>      <span class="keywordflow">continue</span>; <span class="comment">// Get out of the loop.</span></div>
<div class="line"><a id="l00929" name="l00929"></a><span class="lineno">  929</span>    }</div>
<div class="line"><a id="l00930" name="l00930"></a><span class="lineno">  930</span>    <span class="comment">// else</span></div>
<div class="line"><a id="l00931" name="l00931"></a><span class="lineno">  931</span> </div>
<div class="line"><a id="l00932" name="l00932"></a><span class="lineno">  932</span>    <span class="keywordflow">if</span> (n_sent_or_zero == low_lvl_blob_view.size())</div>
<div class="line"><a id="l00933" name="l00933"></a><span class="lineno">  933</span>    {</div>
<div class="line"><a id="l00934" name="l00934"></a><span class="lineno">  934</span>      <span class="comment">// Everything was sent nicely!</span></div>
<div class="line"><a id="l00935" name="l00935"></a><span class="lineno">  935</span>      m_snd_pending_payloads_q.pop(); <span class="comment">// This should dealloc low_lvl_payload.m_blob in particular.</span></div>
<div class="line"><a id="l00936" name="l00936"></a><span class="lineno">  936</span>    }</div>
<div class="line"><a id="l00937" name="l00937"></a><span class="lineno">  937</span>    <span class="keywordflow">else</span> <span class="comment">// if (n_sent_or_zero != low_lvl_payload.m_blob.size())</span></div>
<div class="line"><a id="l00938" name="l00938"></a><span class="lineno">  938</span>    {</div>
<div class="line"><a id="l00939" name="l00939"></a><span class="lineno">  939</span>      <span class="comment">/* Some or all of the payload could not be sent (it would-block if we tried to send the rest now).</span></div>
<div class="line"><a id="l00940" name="l00940"></a><span class="lineno">  940</span><span class="comment">       * This is similar to snd_sync_write_or_q_payload(), but we needn&#39;t enqueue it, as it&#39;s already enqueued;</span></div>
<div class="line"><a id="l00941" name="l00941"></a><span class="lineno">  941</span><span class="comment">       * just &quot;edit&quot; it in-place as needed. */</span></div>
<div class="line"><a id="l00942" name="l00942"></a><span class="lineno">  942</span>      <span class="keywordflow">if</span> (n_sent_or_zero != 0)</div>
<div class="line"><a id="l00943" name="l00943"></a><span class="lineno">  943</span>      {</div>
<div class="line"><a id="l00944" name="l00944"></a><span class="lineno">  944</span>        <span class="comment">// Even if (!m_hndl_or_null.null()): 1 bytes were sent =&gt; so was the native handle.</span></div>
<div class="line"><a id="l00945" name="l00945"></a><span class="lineno">  945</span>        low_lvl_payload.m_hndl_or_null = <a class="code hl_typedef" href="namespaceipc_1_1transport.html#a7ee4551983d9df16ec16a3139bac50e8">Native_handle</a>();</div>
<div class="line"><a id="l00946" name="l00946"></a><span class="lineno">  946</span>        <span class="comment">/* Slide its .begin() to the right by n_sent_or_zero (might be no-op if was not writable after all).</span></div>
<div class="line"><a id="l00947" name="l00947"></a><span class="lineno">  947</span><span class="comment">         * Note internally it&#39;s just a size_t +=; no realloc or anything. */</span></div>
<div class="line"><a id="l00948" name="l00948"></a><span class="lineno">  948</span>        low_lvl_payload.m_blob.start_past_prefix_inc(n_sent_or_zero);</div>
<div class="line"><a id="l00949" name="l00949"></a><span class="lineno">  949</span>      }</div>
<div class="line"><a id="l00950" name="l00950"></a><span class="lineno">  950</span>      <span class="comment">// else if (n_sent_or_zero == 0) { Nothing was sent, so no edits needed to low_lvl_payload. }</span></div>
<div class="line"><a id="l00951" name="l00951"></a><span class="lineno">  951</span>      would_block = <span class="keyword">true</span>; <span class="comment">// Stop; would-block if we tried more.</span></div>
<div class="line"><a id="l00952" name="l00952"></a><span class="lineno">  952</span>    }</div>
<div class="line"><a id="l00953" name="l00953"></a><span class="lineno">  953</span>  }</div>
<div class="line"><a id="l00954" name="l00954"></a><span class="lineno">  954</span>  <span class="keywordflow">while</span> ((!m_snd_pending_payloads_q.empty()) &amp;&amp; (!would_block) &amp;&amp; (!m_snd_pending_err_code));</div>
<div class="line"><a id="l00955" name="l00955"></a><span class="lineno">  955</span> </div>
<div class="line"><a id="l00956" name="l00956"></a><span class="lineno">  956</span>  <span class="comment">// Careful!  This must be done before the `if` sequence below, as it can make m_snd_pending_err_code truthy after all.</span></div>
<div class="line"><a id="l00957" name="l00957"></a><span class="lineno">  957</span>  <span class="keywordflow">if</span> ((!m_snd_pending_err_code) &amp;&amp; (!m_snd_pending_payloads_q.empty()))</div>
<div class="line"><a id="l00958" name="l00958"></a><span class="lineno">  958</span>  {</div>
<div class="line"><a id="l00959" name="l00959"></a><span class="lineno">  959</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Out-queue has not been emptied.  Must keep async-send chain going.&quot;</span>);</div>
<div class="line"><a id="l00960" name="l00960"></a><span class="lineno">  960</span> </div>
<div class="line"><a id="l00961" name="l00961"></a><span class="lineno">  961</span>    <span class="comment">// Continue the chain (this guy &quot;asynchronously&quot; brought us here in the first place).</span></div>
<div class="line"><a id="l00962" name="l00962"></a><span class="lineno">  962</span>    snd_async_write_q_head_payload();</div>
<div class="line"><a id="l00963" name="l00963"></a><span class="lineno">  963</span>    <span class="comment">/* To be clear: queue can now only become empty in &quot;async&quot; handler, not synchronously here.</span></div>
<div class="line"><a id="l00964" name="l00964"></a><span class="lineno">  964</span><span class="comment">     *</span></div>
<div class="line"><a id="l00965" name="l00965"></a><span class="lineno">  965</span><span class="comment">     * Reasoning sanity check: How could m_snd_pending_err_code become truthy here yet falsy (success)</span></div>
<div class="line"><a id="l00966" name="l00966"></a><span class="lineno">  966</span><span class="comment">     * through the do/while() loop above?  Answer: The writes could work; then after the last such write,</span></div>
<div class="line"><a id="l00967" name="l00967"></a><span class="lineno">  967</span><span class="comment">     * but before snd_async_write_q_head_payload() -- which needs an m_*peer_socket member to indicate</span></div>
<div class="line"><a id="l00968" name="l00968"></a><span class="lineno">  968</span><span class="comment">     * connection is still healthy, to initiate the user-executed wait-for-writable -- incoming-direction processing</span></div>
<div class="line"><a id="l00969" name="l00969"></a><span class="lineno">  969</span><span class="comment">     * could have hosed m_*peer_socket.  E.g., it tried to nb-receive and exposed newly-arrived error condition. */</span></div>
<div class="line"><a id="l00970" name="l00970"></a><span class="lineno">  970</span>  }</div>
<div class="line"><a id="l00971" name="l00971"></a><span class="lineno">  971</span>  <span class="comment">/* ^-- if ((!m_snd_pending_err_code) &amp;&amp; (!m_snd_pending_payloads_q.empty()))</span></div>
<div class="line"><a id="l00972" name="l00972"></a><span class="lineno">  972</span><span class="comment">   * (but m_snd_pending_err_code may have become truthy inside). */</span></div>
<div class="line"><a id="l00973" name="l00973"></a><span class="lineno">  973</span> </div>
<div class="line"><a id="l00974" name="l00974"></a><span class="lineno">  974</span>  <span class="comment">// Lastly deal with possibly having to fire async_end_sending() completion handler.</span></div>
<div class="line"><a id="l00975" name="l00975"></a><span class="lineno">  975</span> </div>
<div class="line"><a id="l00976" name="l00976"></a><span class="lineno">  976</span>  <span class="keywordtype">bool</span> invoke_on_done = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00977" name="l00977"></a><span class="lineno">  977</span>  <span class="keywordflow">if</span> (m_snd_pending_err_code)</div>
<div class="line"><a id="l00978" name="l00978"></a><span class="lineno">  978</span>  {</div>
<div class="line"><a id="l00979" name="l00979"></a><span class="lineno">  979</span>    invoke_on_done = !m_snd_pending_on_last_send_done_func_or_empty.empty();</div>
<div class="line"><a id="l00980" name="l00980"></a><span class="lineno">  980</span>    FLOW_LOG_WARNING(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: User-performed wait-for-writable reported completion; &quot;</span></div>
<div class="line"><a id="l00981" name="l00981"></a><span class="lineno">  981</span>                     <span class="stringliteral">&quot;wanted to nb-send any queued data and possibly initiated another wait-for-writable; &quot;</span></div>
<div class="line"><a id="l00982" name="l00982"></a><span class="lineno">  982</span>                     <span class="stringliteral">&quot;got error during an nb-send or when initiating wait; TRACE details above.  &quot;</span></div>
<div class="line"><a id="l00983" name="l00983"></a><span class="lineno">  983</span>                     <span class="stringliteral">&quot;Error code details follow: &quot;</span></div>
<div class="line"><a id="l00984" name="l00984"></a><span class="lineno">  984</span>                     <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; m_snd_pending_err_code &lt;&lt; <span class="stringliteral">&quot;] [&quot;</span> &lt;&lt; m_snd_pending_err_code.message() &lt;&lt; <span class="stringliteral">&quot;].  &quot;</span></div>
<div class="line"><a id="l00985" name="l00985"></a><span class="lineno">  985</span>                     <span class="stringliteral">&quot;Saved error code to return in next user send attempt if any.  &quot;</span></div>
<div class="line"><a id="l00986" name="l00986"></a><span class="lineno">  986</span>                     <span class="stringliteral">&quot;Will run graceful-sends-close completion handler? = [&quot;</span>  &lt;&lt; invoke_on_done &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00987" name="l00987"></a><span class="lineno">  987</span> </div>
<div class="line"><a id="l00988" name="l00988"></a><span class="lineno">  988</span>    assert((!m_snd_pending_payloads_q.empty()) &amp;&amp; <span class="stringliteral">&quot;Opportunistic sanity check.&quot;</span>);</div>
<div class="line"><a id="l00989" name="l00989"></a><span class="lineno">  989</span>  }</div>
<div class="line"><a id="l00990" name="l00990"></a><span class="lineno">  990</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (m_snd_pending_payloads_q.empty()) <span class="comment">// &amp;&amp; (!m_snd_pending_err_code)</span></div>
<div class="line"><a id="l00991" name="l00991"></a><span class="lineno">  991</span>  {</div>
<div class="line"><a id="l00992" name="l00992"></a><span class="lineno">  992</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Out-queue has been emptied.&quot;</span>);</div>
<div class="line"><a id="l00993" name="l00993"></a><span class="lineno">  993</span> </div>
<div class="line"><a id="l00994" name="l00994"></a><span class="lineno">  994</span>    <span class="keywordflow">if</span> (!m_snd_pending_on_last_send_done_func_or_empty.empty())</div>
<div class="line"><a id="l00995" name="l00995"></a><span class="lineno">  995</span>    {</div>
<div class="line"><a id="l00996" name="l00996"></a><span class="lineno">  996</span>      <span class="comment">// INFO-log is okay, as this occurs at most once per *this.</span></div>
<div class="line"><a id="l00997" name="l00997"></a><span class="lineno">  997</span>      FLOW_LOG_INFO(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00998" name="l00998"></a><span class="lineno">  998</span>                    <span class="stringliteral">&quot;We sent graceful-close and any preceding user messages with success.  Will now inform user via &quot;</span></div>
<div class="line"><a id="l00999" name="l00999"></a><span class="lineno">  999</span>                    <span class="stringliteral">&quot;graceful-sends-close completion handler.&quot;</span>);</div>
<div class="line"><a id="l01000" name="l01000"></a><span class="lineno"> 1000</span>      invoke_on_done = <span class="keyword">true</span>;</div>
<div class="line"><a id="l01001" name="l01001"></a><span class="lineno"> 1001</span>    }</div>
<div class="line"><a id="l01002" name="l01002"></a><span class="lineno"> 1002</span>  } <span class="comment">// else if (m_snd_pending_payloads_q.empty() &amp;&amp; (!m_snd_pending_err_code))</span></div>
<div class="line"><a id="l01003" name="l01003"></a><span class="lineno"> 1003</span>  <span class="comment">// else if ((!m_snd_pending_payloads_q.empty()) &amp;&amp; (!m_snd_pending_err_code)) { Async-wait started. }</span></div>
<div class="line"><a id="l01004" name="l01004"></a><span class="lineno"> 1004</span> </div>
<div class="line"><a id="l01005" name="l01005"></a><span class="lineno"> 1005</span>  <span class="keywordflow">if</span> (invoke_on_done)</div>
<div class="line"><a id="l01006" name="l01006"></a><span class="lineno"> 1006</span>  {</div>
<div class="line"><a id="l01007" name="l01007"></a><span class="lineno"> 1007</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Socket stream [&quot;</span> &lt;&lt; *<span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Executing end-sending completion handler now.&quot;</span>);</div>
<div class="line"><a id="l01008" name="l01008"></a><span class="lineno"> 1008</span>    <span class="keyword">auto</span> on_done_func = std::move(m_snd_pending_on_last_send_done_func_or_empty);</div>
<div class="line"><a id="l01009" name="l01009"></a><span class="lineno"> 1009</span>    m_snd_pending_on_last_send_done_func_or_empty.clear(); <span class="comment">// For cleanliness, in case move() didn&#39;t do it.</span></div>
<div class="line"><a id="l01010" name="l01010"></a><span class="lineno"> 1010</span> </div>
<div class="line"><a id="l01011" name="l01011"></a><span class="lineno"> 1011</span>    on_done_func(m_snd_pending_err_code);</div>
<div class="line"><a id="l01012" name="l01012"></a><span class="lineno"> 1012</span>    FLOW_LOG_TRACE(<span class="stringliteral">&quot;Handler completed.&quot;</span>);</div>
<div class="line"><a id="l01013" name="l01013"></a><span class="lineno"> 1013</span>  }</div>
<div class="line"><a id="l01014" name="l01014"></a><span class="lineno"> 1014</span>} <span class="comment">// Native_socket_stream::Impl::snd_on_ev_peer_socket_writable_or_error()</span></div>
<div class="line"><a id="l01015" name="l01015"></a><span class="lineno"> 1015</span> </div>
<div class="line"><a id="l01016" name="l01016"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a5fe9845081e656642a8b9f82f82228f6"> 1016</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a5fe9845081e656642a8b9f82f82228f6">Native_socket_stream::Impl::send_meta_blob_max_size</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l01017" name="l01017"></a><span class="lineno"> 1017</span><span class="keyword"></span>{</div>
<div class="line"><a id="l01018" name="l01018"></a><span class="lineno"> 1018</span>  <span class="keywordflow">return</span> state_peer(<span class="stringliteral">&quot;send_meta_blob_max_size()&quot;</span>) ? <a class="code hl_variable" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#a00624e2fc3757012d13e3dc0feb26a21">S_MAX_META_BLOB_LENGTH</a> : 0;</div>
<div class="line"><a id="l01019" name="l01019"></a><span class="lineno"> 1019</span>}</div>
<div class="line"><a id="l01020" name="l01020"></a><span class="lineno"> 1020</span> </div>
<div class="line"><a id="l01021" name="l01021"></a><span class="lineno"><a class="line" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#afa6b6e1be0f00add0b53b3263c412c76"> 1021</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#afa6b6e1be0f00add0b53b3263c412c76">Native_socket_stream::Impl::send_blob_max_size</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l01022" name="l01022"></a><span class="lineno"> 1022</span><span class="keyword"></span>{</div>
<div class="line"><a id="l01023" name="l01023"></a><span class="lineno"> 1023</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#a945fb744696feed25067241ce2b6ca4b">send_meta_blob_max_size</a>();</div>
<div class="line"><a id="l01024" name="l01024"></a><span class="lineno"> 1024</span>}</div>
<div class="line"><a id="l01025" name="l01025"></a><span class="lineno"> 1025</span> </div>
<div class="line"><a id="l01026" name="l01026"></a><span class="lineno"> 1026</span>} <span class="comment">// namespace ipc::transport::sync_io</span></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Protocol__negotiator_html_a54480f0849ddb5635302b42ed87c43af"><div class="ttname"><a href="classipc_1_1transport_1_1Protocol__negotiator.html#a54480f0849ddb5635302b42ed87c43af">ipc::transport::Protocol_negotiator::local_max_proto_ver_for_sending</a></div><div class="ttdeci">proto_ver_t local_max_proto_ver_for_sending()</div><div class="ttdoc">To be called at most once, this returns local_max_proto_ver from ctor the first time and S_VER_UNKNOW...</div><div class="ttdef"><b>Definition:</b> <a href="protocol__negotiator_8cpp_source.html#l00131">protocol_negotiator.cpp:131</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1Protocol__negotiator_html_aa7e47f4f6a700aeaa9600a5426a17292"><div class="ttname"><a href="classipc_1_1transport_1_1Protocol__negotiator.html#aa7e47f4f6a700aeaa9600a5426a17292">ipc::transport::Protocol_negotiator::S_VER_UNKNOWN</a></div><div class="ttdeci">static constexpr proto_ver_t S_VER_UNKNOWN</div><div class="ttdoc">A proto_ver_t value, namely a negative one, which is a reserved value indicating &quot;unknown version&quot;; i...</div><div class="ttdef"><b>Definition:</b> <a href="protocol__negotiator_8hpp_source.html#l00215">protocol_negotiator.hpp:215</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a0257a7903bff120aa1523f8de04bccf7"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a0257a7903bff120aa1523f8de04bccf7">ipc::transport::sync_io::Native_socket_stream::Impl::m_snd_pending_err_code</a></div><div class="ttdeci">Error_code m_snd_pending_err_code</div><div class="ttdoc">The first and only connection-hosing error condition detected when attempting to low-level-write on m...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2native__socket__stream__impl_8hpp_source.html#l01392">native_socket_stream_impl.hpp:1392</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a0aca995c7150e72219b422c188d9bc23"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a0aca995c7150e72219b422c188d9bc23">ipc::transport::sync_io::Native_socket_stream::Impl::async_end_sending</a></div><div class="ttdeci">bool async_end_sending(Error_code *sync_err_code, flow::async::Task_asio_err &amp;&amp;on_done_func)</div><div class="ttdoc">See Native_socket_stream counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00277">native_socket_stream_impl_snd.cpp:277</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a2c2b11477fb5089af7608c45dec939c0"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a2c2b11477fb5089af7608c45dec939c0">ipc::transport::sync_io::Native_socket_stream::Impl::snd_on_ev_peer_socket_writable_or_error</a></div><div class="ttdeci">void snd_on_ev_peer_socket_writable_or_error()</div><div class="ttdoc">Completion handler, from outside event loop via sync_io pattern, for the async-wait initiated by snd_...</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00900">native_socket_stream_impl_snd.cpp:900</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a393316703a666a9b022f2b879337b920"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a393316703a666a9b022f2b879337b920">ipc::transport::sync_io::Native_socket_stream::Impl::m_protocol_negotiator</a></div><div class="ttdeci">Protocol_negotiator m_protocol_negotiator</div><div class="ttdoc">Handles the protocol negotiation at the start of the pipe.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2native__socket__stream__impl_8hpp_source.html#l01171">native_socket_stream_impl.hpp:1171</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a3c1c949f345f0ceef5eeca3c2edec291"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a3c1c949f345f0ceef5eeca3c2edec291">ipc::transport::sync_io::Native_socket_stream::Impl::snd_sync_write_or_q_payload</a></div><div class="ttdeci">bool snd_sync_write_or_q_payload(Native_handle hndl_or_null, const util::Blob_const &amp;orig_blob, bool avoid_qing)</div><div class="ttdoc">Either synchronously sends hndl_or_null handle (if any) and orig_blob low-level blob over m_peer_sock...</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00606">native_socket_stream_impl_snd.cpp:606</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a4b31da3a7ff63f307bd08e288c391556"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a4b31da3a7ff63f307bd08e288c391556">ipc::transport::sync_io::Native_socket_stream::Impl::snd_on_ev_auto_ping_now_timer_fired</a></div><div class="ttdeci">void snd_on_ev_auto_ping_now_timer_fired()</div><div class="ttdoc">Handler for the async-wait, via util::sync_io::Timer_event_emitter, of the auto-ping timer firing; if...</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00544">native_socket_stream_impl_snd.cpp:544</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a59e9935bdd704c40173a40e87b5db131"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a59e9935bdd704c40173a40e87b5db131">ipc::transport::sync_io::Native_socket_stream::Impl::send_native_handle</a></div><div class="ttdeci">bool send_native_handle(Native_handle hndl_or_null, const util::Blob_const &amp;meta_blob, Error_code *err_code)</div><div class="ttdoc">See Native_socket_stream counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00094">native_socket_stream_impl_snd.cpp:94</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a5e9ed53ef25f4413c8da315f8dbcff2c"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a5e9ed53ef25f4413c8da315f8dbcff2c">ipc::transport::sync_io::Native_socket_stream::Impl::snd_async_write_q_head_payload</a></div><div class="ttdeci">void snd_async_write_q_head_payload()</div><div class="ttdoc">Initiates async-write over m_peer_socket of the low-level payload at the head of out-queue m_snd_pend...</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00846">native_socket_stream_impl_snd.cpp:846</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a5fe9845081e656642a8b9f82f82228f6"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a5fe9845081e656642a8b9f82f82228f6">ipc::transport::sync_io::Native_socket_stream::Impl::send_meta_blob_max_size</a></div><div class="ttdeci">size_t send_meta_blob_max_size() const</div><div class="ttdoc">See Native_socket_stream counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l01016">native_socket_stream_impl_snd.cpp:1016</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a6337b0d5d703f124def66853e36b62e5"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a6337b0d5d703f124def66853e36b62e5">ipc::transport::sync_io::Native_socket_stream::Impl::async_end_sending_impl</a></div><div class="ttdeci">bool async_end_sending_impl(Error_code *sync_err_code_ptr_or_null, flow::async::Task_asio_err &amp;&amp;on_done_func_or_empty)</div><div class="ttdoc">*end_sending() body.</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00302">native_socket_stream_impl_snd.cpp:302</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a65eea0cec146df598fce1d9ab5ce7e15"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a65eea0cec146df598fce1d9ab5ce7e15">ipc::transport::sync_io::Native_socket_stream::Impl::start_send_native_handle_ops</a></div><div class="ttdeci">bool start_send_native_handle_ops(util::sync_io::Event_wait_func &amp;&amp;ev_wait_func)</div><div class="ttdoc">See Native_socket_stream counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00028">native_socket_stream_impl_snd.cpp:28</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a6a01d2df2772ee72e4386e84684394e3"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a6a01d2df2772ee72e4386e84684394e3">ipc::transport::sync_io::Native_socket_stream::Impl::start_send_blob_ops</a></div><div class="ttdeci">bool start_send_blob_ops(util::sync_io::Event_wait_func &amp;&amp;ev_wait_func)</div><div class="ttdoc">See Native_socket_stream counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00083">native_socket_stream_impl_snd.cpp:83</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_a881c376f1ee37f9b1a20f770824f55d9"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#a881c376f1ee37f9b1a20f770824f55d9">ipc::transport::sync_io::Native_socket_stream::Impl::low_lvl_payload_blob_length_t</a></div><div class="ttdeci">uint16_t low_lvl_payload_blob_length_t</div><div class="ttdoc">The type used to encode the meta-blob length; this puts a cap on how long the meta-blobs can be.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2detail_2native__socket__stream__impl_8hpp_source.html#l00685">native_socket_stream_impl.hpp:685</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_aaef639c110a0e3d6804da84f9458ae78"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#aaef639c110a0e3d6804da84f9458ae78">ipc::transport::sync_io::Native_socket_stream::Impl::send_blob</a></div><div class="ttdeci">bool send_blob(const util::Blob_const &amp;blob, Error_code *err_code)</div><div class="ttdoc">See Native_socket_stream counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00088">native_socket_stream_impl_snd.cpp:88</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_ab7b382067804495cbae180a5bc1a2757"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#ab7b382067804495cbae180a5bc1a2757">ipc::transport::sync_io::Native_socket_stream::Impl::auto_ping</a></div><div class="ttdeci">bool auto_ping(util::Fine_duration period)</div><div class="ttdoc">See Native_socket_stream counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00440">native_socket_stream_impl_snd.cpp:440</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_aef7a604a32db50eaf5fc501e5a205dd3"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#aef7a604a32db50eaf5fc501e5a205dd3">ipc::transport::sync_io::Native_socket_stream::Impl::end_sending</a></div><div class="ttdeci">bool end_sending()</div><div class="ttdoc">See Native_socket_stream counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00272">native_socket_stream_impl_snd.cpp:272</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_af321a9b3ed8dc21f23988bf79c7c33f0"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#af321a9b3ed8dc21f23988bf79c7c33f0">ipc::transport::sync_io::Native_socket_stream::Impl::snd_nb_write_low_lvl_payload</a></div><div class="ttdeci">size_t snd_nb_write_low_lvl_payload(Native_handle hndl_or_null, const util::Blob_const &amp;blob, Error_code *err_code)</div><div class="ttdoc">Utility that sends non-empty blob, and (unless null) hndl_or_null associated with its 1st byte,...</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l00740">native_socket_stream_impl_snd.cpp:740</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl_html_afa6b6e1be0f00add0b53b3263c412c76"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream_1_1Impl.html#afa6b6e1be0f00add0b53b3263c412c76">ipc::transport::sync_io::Native_socket_stream::Impl::send_blob_max_size</a></div><div class="ttdeci">size_t send_blob_max_size() const</div><div class="ttdoc">See Native_socket_stream counterpart.</div><div class="ttdef"><b>Definition:</b> <a href="native__socket__stream__impl__snd_8cpp_source.html#l01021">native_socket_stream_impl_snd.cpp:1021</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_html_a00624e2fc3757012d13e3dc0feb26a21"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#a00624e2fc3757012d13e3dc0feb26a21">ipc::transport::sync_io::Native_socket_stream::S_MAX_META_BLOB_LENGTH</a></div><div class="ttdeci">static const size_t &amp; S_MAX_META_BLOB_LENGTH</div><div class="ttdoc">The maximum length of a blob that can be sent by this protocol.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2native__socket__stream_8hpp_source.html#l00197">native_socket_stream.hpp:197</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_html_a2bd0b6a8badd0b770917bb9df9ad6093"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#a2bd0b6a8badd0b770917bb9df9ad6093">ipc::transport::sync_io::Native_socket_stream::start_send_native_handle_ops</a></div><div class="ttdeci">bool start_send_native_handle_ops(Event_wait_func_t &amp;&amp;ev_wait_func)</div><div class="ttdoc">Implements Native_handle_sender API per contract.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2native__socket__stream_8hpp_source.html#l00779">native_socket_stream.hpp:779</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_html_a945fb744696feed25067241ce2b6ca4b"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#a945fb744696feed25067241ce2b6ca4b">ipc::transport::sync_io::Native_socket_stream::send_meta_blob_max_size</a></div><div class="ttdeci">size_t send_meta_blob_max_size() const</div><div class="ttdoc">Implements Native_handle_sender API per contract.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2native__socket__stream_8cpp_source.html#l00102">native_socket_stream.cpp:102</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_html_a9805f7625a1272af64295555f9a1a61b"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#a9805f7625a1272af64295555f9a1a61b">ipc::transport::sync_io::Native_socket_stream::send_native_handle</a></div><div class="ttdeci">bool send_native_handle(Native_handle hndl_or_null, const util::Blob_const &amp;meta_blob, Error_code *err_code=0)</div><div class="ttdoc">Implements Native_handle_sender API per contract.</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2native__socket__stream_8cpp_source.html#l00112">native_socket_stream.cpp:112</a></div></div>
<div class="ttc" id="aclassipc_1_1transport_1_1sync__io_1_1Native__socket__stream_html_aac68d14f4ef33505399df4fd04cd4669"><div class="ttname"><a href="classipc_1_1transport_1_1sync__io_1_1Native__socket__stream.html#aac68d14f4ef33505399df4fd04cd4669">ipc::transport::sync_io::Native_socket_stream::get_logger</a></div><div class="ttdeci">flow::log::Logger * get_logger() const</div><div class="ttdoc">Returns logger (possibly null).</div><div class="ttdef"><b>Definition:</b> <a href="sync__io_2native__socket__stream_8cpp_source.html#l00148">native_socket_stream.cpp:148</a></div></div>
<div class="ttc" id="aipc__core_2src_2ipc_2transport_2error_8hpp_html"><div class="ttname"><a href="ipc__core_2src_2ipc_2transport_2error_8hpp.html">error.hpp</a></div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1asio__local__stream__socket_html_a1022dfd42e9a0d6eab8384b0352decb0"><div class="ttname"><a href="namespaceipc_1_1transport_1_1asio__local__stream__socket.html#a1022dfd42e9a0d6eab8384b0352decb0">ipc::transport::asio_local_stream_socket::nb_write_some_with_native_handle</a></div><div class="ttdeci">size_t nb_write_some_with_native_handle(flow::log::Logger *logger_ptr, Peer_socket *peer_socket_ptr, Native_handle payload_hndl, const util::Blob_const &amp;payload_blob, Error_code *err_code)</div><div class="ttdoc">boost.asio extension similar to peer_socket-&gt;non_blocking(true); auto n = peer_socket-&gt;write_some(pay...</div><div class="ttdef"><b>Definition:</b> <a href="asio__local__stream__socket_8cpp_source.html#l00036">asio_local_stream_socket.cpp:36</a></div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1asio__local__stream__socket_html_a68071e53f4a048084f8ad26ff3ac6711"><div class="ttname"><a href="namespaceipc_1_1transport_1_1asio__local__stream__socket.html#a68071e53f4a048084f8ad26ff3ac6711">ipc::transport::asio_local_stream_socket::async_write_with_native_handle</a></div><div class="ttdeci">void async_write_with_native_handle(flow::log::Logger *logger_ptr, Peer_socket *peer_socket_ptr, Native_handle payload_hndl, const util::Blob_const &amp;payload_blob, Task_err &amp;&amp;on_sent_or_error)</div><div class="ttdoc">boost.asio extension similar to boost::asio::async_write(Peer_socket&amp;, Blob_const,...</div><div class="ttdef"><b>Definition:</b> <a href="asio__local__stream__socket_8hpp_source.html#l00171">asio_local_stream_socket.hpp:171</a></div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297a42d41c622e92e9053177ba73e75633fe"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297a42d41c622e92e9053177ba73e75633fe">ipc::transport::error::Code::S_SENDS_FINISHED_CANNOT_SEND</a></div><div class="ttdeci">@ S_SENDS_FINISHED_CANNOT_SEND</div><div class="ttdoc">Will not send message: local user already ended sending via API marking this.</div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297aa667487757f9d6300f6888bac40bcc24"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297aa667487757f9d6300f6888bac40bcc24">ipc::transport::error::Code::S_SYNC_IO_WOULD_BLOCK</a></div><div class="ttdeci">@ S_SYNC_IO_WOULD_BLOCK</div><div class="ttdoc">A sync_io operation could not immediately complete; it will complete contingent on active async-wait ...</div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297ac416e988563e44bf15fc6a81743eef53"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297ac416e988563e44bf15fc6a81743eef53">ipc::transport::error::Code::S_INVALID_ARGUMENT</a></div><div class="ttdeci">@ S_INVALID_ARGUMENT</div><div class="ttdoc">User called an API with 1 or more arguments against the API spec.</div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1error_html_adfef15ef4e76cc55d652fbd9c2797297adc5d7b9dbaa8c76c6835e3c9a7942410"><div class="ttname"><a href="namespaceipc_1_1transport_1_1error.html#adfef15ef4e76cc55d652fbd9c2797297adc5d7b9dbaa8c76c6835e3c9a7942410">ipc::transport::error::Code::S_LOW_LVL_TRANSPORT_HOSED_CANNOT_SEND</a></div><div class="ttdeci">@ S_LOW_LVL_TRANSPORT_HOSED_CANNOT_SEND</div><div class="ttdoc">Unable to send outgoing traffic: an earlier-reported, or at least logged, system error had hosed the ...</div></div>
<div class="ttc" id="anamespaceipc_1_1transport_1_1sync__io_html"><div class="ttname"><a href="namespaceipc_1_1transport_1_1sync__io.html">ipc::transport::sync_io</a></div><div class="ttdoc">sync_io-pattern counterparts to async-I/O-pattern object types in parent namespace ipc::transport.</div><div class="ttdef"><b>Definition:</b> <a href="detail_2transport__fwd_8hpp_source.html#l00069">transport_fwd.hpp:70</a></div></div>
<div class="ttc" id="anamespaceipc_1_1transport_html_a7ee4551983d9df16ec16a3139bac50e8"><div class="ttname"><a href="namespaceipc_1_1transport.html#a7ee4551983d9df16ec16a3139bac50e8">ipc::transport::Native_handle</a></div><div class="ttdeci">util::Native_handle Native_handle</div><div class="ttdoc">Convenience alias for the commonly used type util::Native_handle.</div><div class="ttdef"><b>Definition:</b> <a href="transport__fwd_8hpp_source.html#l00081">transport_fwd.hpp:81</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_1_1sync__io_html_aa0b9a3cc6bdc7dedbef4f9e06851aa24"><div class="ttname"><a href="namespaceipc_1_1util_1_1sync__io.html#aa0b9a3cc6bdc7dedbef4f9e06851aa24">ipc::util::sync_io::Event_wait_func</a></div><div class="ttdeci">Function&lt; void(Asio_waitable_native_handle *hndl_of_interest, bool ev_of_interest_snd_else_rcv, Task_ptr &amp;&amp;on_active_ev_func)&gt; Event_wait_func</div><div class="ttdoc">In sync_io pattern, concrete type storing user-supplied function invoked by pattern-implementing ipc:...</div><div class="ttdef"><b>Definition:</b> <a href="sync__io__fwd_8hpp_source.html#l00798">sync_io_fwd.hpp:800</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_a31e67d3a017477a04b313927e2f2c733"><div class="ttname"><a href="namespaceipc_1_1util.html#a31e67d3a017477a04b313927e2f2c733">ipc::util::Task</a></div><div class="ttdeci">flow::async::Task Task</div><div class="ttdoc">Short-hand for polymorphic function (a-la std::function&lt;&gt;) that takes no arguments and returns nothin...</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00122">util_fwd.hpp:122</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_ac66141280c3b7295a86b65209f31cc58"><div class="ttname"><a href="namespaceipc_1_1util.html#ac66141280c3b7295a86b65209f31cc58">ipc::util::Fine_duration</a></div><div class="ttdeci">flow::Fine_duration Fine_duration</div><div class="ttdoc">Short-hand for Flow's Fine_duration.</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00117">util_fwd.hpp:117</a></div></div>
<div class="ttc" id="anamespaceipc_1_1util_html_ae0be7edba7e30ffa3f8b742af621f2ab"><div class="ttname"><a href="namespaceipc_1_1util.html#ae0be7edba7e30ffa3f8b742af621f2ab">ipc::util::Blob_const</a></div><div class="ttdeci">boost::asio::const_buffer Blob_const</div><div class="ttdoc">Short-hand for an immutable blob somewhere in memory, stored as exactly a void const * and a size_t.</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00134">util_fwd.hpp:134</a></div></div>
<div class="ttc" id="anamespaceipc_html_aa3192e586cc45d3e7c22463bf2760f89"><div class="ttname"><a href="namespaceipc.html#aa3192e586cc45d3e7c22463bf2760f89">ipc::Error_code</a></div><div class="ttdeci">flow::Error_code Error_code</div><div class="ttdoc">Short-hand for flow::Error_code which is very common.</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00298">common.hpp:298</a></div></div>
<div class="ttc" id="astructipc_1_1util_1_1Native__handle_html"><div class="ttname"><a href="structipc_1_1util_1_1Native__handle.html">ipc::util::Native_handle</a></div><div class="ttdoc">A monolayer-thin wrapper around a native handle, a/k/a descriptor a/k/a FD.</div><div class="ttdef"><b>Definition:</b> <a href="native__handle_8hpp_source.html#l00062">native_handle.hpp:63</a></div></div>
<div class="ttc" id="astructipc_1_1util_1_1Native__handle_html_a11bd62ce0a7bef4bdfe666201c26d4dc"><div class="ttname"><a href="structipc_1_1util_1_1Native__handle.html#a11bd62ce0a7bef4bdfe666201c26d4dc">ipc::util::Native_handle::null</a></div><div class="ttdeci">bool null() const</div><div class="ttdoc">Returns true if and only if m_native_handle equals S_NULL_HANDLE.</div><div class="ttdef"><b>Definition:</b> <a href="native__handle_8cpp_source.html#l00061">native_handle.cpp:61</a></div></div>
<div class="ttc" id="async__io_2detail_2native__socket__stream__impl_8hpp_html"><div class="ttname"><a href="sync__io_2detail_2native__socket__stream__impl_8hpp.html">native_socket_stream_impl.hpp</a></div></div>
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